11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The church of Sveta Petka Samardzhiyska, patron saint of saddlers, and the statue of St. Sofia, Sveta Sofia. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Interior view of the Central Market Hall Sofia on Maria Luiza Boulevard. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Statue of St. Sofia, Sveta Sofia. She is considered the protector of the city and the country. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center at Maria Luiza Boulevard with fountain. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The building of the former Central Mineral Spa Sofia, Zentralna mineralna banja, in the center at Maria Luiza Boulevard with fountain. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque (l) in the centre and the Central Market Hall Sofia on Maria Luiza Boulevard. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center at Maria Luiza Boulevard. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: A man has to sit down at a sales stand on the street to buy drinks because he is too low. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: An old flaking mural with the writing Chupa Chups can be seen on a house wall in the centre. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The National Palace of Culture, a congress and concert centre in the city centre. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Sveta Nedelya Cathedral on Largo Square. It is a medieval church that has been destroyed several times. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Sofia Synagogue, the largest Sephardic Spanish Jewish synagogue in Europe. It is the only Jewish prayer house in Sofia. The Sofia Synagogue is one of the most beautiful architectural monuments in Bulgaria. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Flags of the EU and Bulgaria hang on a building in the centre. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: A street in the center with parked cars and illuminated and unlit houses, taken in the evening in the blue hour. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: A street in the center with parked cars and illuminated and unlit houses, taken in the evening in the blue hour. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: A man has to sit down at a sales stand on the street to buy drinks because he is too low. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Cars stand in the evening at a traffic light in the center. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The statue of St. Sofia, Sveta Sofia, taken in the evening at sunset. She is considered the protector of the city and the country. The evening sky is reflected in glass panes protecting excavations in the centre. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The statue of St. Sofia, Sveta Sofia, taken in the evening at sunset. She is considered the protector of the city and the country. The evening sky is reflected in glass panes protecting excavations in the centre. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Sofia Synagogue, the largest Sephardic Spanish Jewish synagogue in Europe. It is the only Jewish prayer house in Sofia. The Sofia Synagogue is one of the most beautiful architectural monuments in Bulgaria. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Sofia Synagogue, the largest Sephardic Spanish Jewish synagogue in Europe, recorded in the evening at sunset. It is the only Jewish prayer house in Sofia. The Sofia Synagogue is one of the most beautiful architectural monuments in Bulgaria. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Interior view of Sveta Nedelya Cathedral. It is a medieval church that has been destroyed several times. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: A sales stand with pictures of saints and icons. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Interior view of Sveta Nedelya Cathedral. It is a medieval church that has been destroyed several times. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: A traffic control house stands at an intersection. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: The Red Brick Rotunda of Saint George in the historic centre of Sofia, called Serdica. The building was erected by the Romans in the 4th century as a cylindrical domed building. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11 September 2018, Bulgaria, Sofia: 11.09.2018, Bulgaria, Sofia: Sveta Nedelya Cathedral on Largo Square. It is a medieval church that has been destroyed several times. Photo: Jens Kalaene/dpa-Zentralbild/ZB

11.09.2018, Bulgaria, Sofia: The Cathedral of Sveti Nedelja in Largo Square. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The statue of Saint Sofia, Sveta Sofia, taken in the evening at sunset. She is considered the protector of the city and the country. The evening sky is reflected in glass panes that protect excavations in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Interior shot of the cathedral Sweta Nedelja. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Flags of the EU and Bulgaria hang on a building in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The National Palace of Culture, a convention and concert center in the city center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Cars are in the evening at a traffic light in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The red brick rotunda of Saint George in the historical center of Sofia, called Serdica. The building was built by the Romans in the 4th century as a cylindrical dome. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The statue of Saint Sofia, Sveta Sofia, taken in the evening at sunset. She is considered the protector of the city and the country. The evening sky is reflected in glass panes that protect excavations in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A stall with pictures of saints and icons. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Sofia synagogue, the largest Sephardic Spanish-Jewish synagogue in Europe, recorded in the evening at sunset. It is the only Jewish prayer house in Sofia. The Sofia synagogue is one of the most beautiful architectural monuments in Bulgaria. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Sofia synagogue, the largest Sephardic Spanish-Jewish synagogue in Europe. It is the only Jewish prayer house in Sofia. The Sofia synagogue is one of the most beautiful architectural monuments in Bulgaria. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Interior shot of the cathedral Sweta Nedelja. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Residents fill in mineral water at the Sofiot thermal spring at the Zentralbad. These taps and fountains are used very actively, especially by older people, to fill their healing mineral water with bottles and canisters or to drink it on site. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Broken and easy walkway slabs on Maria-Luiza-Boulevard. The streets are often in poor condition. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Exterior of the Central Market Hall Sofia on Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on the Maria-Luiza-Boulevard with heavy traffic, trams and taxis. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque (L) in the center and the Central Market Hall Sofia on the Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Sofia synagogue, the largest Sephardic Spanish-Jewish synagogue in Europe. It is the only Jewish prayer house in Sofia. The Sofia synagogue is one of the most beautiful architectural monuments in Bulgaria. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Interior view of the Central Market Hall Sofia on Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The building of the former Central Mineral Bath Sofia, Zentralna mineralna banja, in the center on the Maria-Luiza-Boulevard with fountain. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on the Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Broken and easy walkway slabs on Maria-Luiza-Boulevard. On the street, the views of the pedestrians are painted in order to cross the road safely. The streets are often in poor condition. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A fountain is illuminated in the morning by the sunlight in front of the building of the former Central Mineral Bath Sofia, Zentralna mineralna banja. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Cathedral of Sveti Nedelja in Largo Square. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A man has to squat on a street stall for buying drinks because he is too low. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A traffic surveillance center is at an intersection. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Cathedral of Sveti Nedelja in Largo Square. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: An old flattening mural with the inscription Chupa Chups can be seen on a house wall in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The National Palace of Culture, a convention and concert center in the city center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A man has to squat on a street stall for buying drinks because he is too low. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard. In the foreground excavations of the ancient cultural and communication complex Serdika. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Women are sitting under umbrellas in a cafe in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A souvenir shop in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A street in the center with parked cars and illuminated and unlit residential buildings, taken in the evening in the blue hour. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Cathedral of Sveti Nedelja in Largo Square. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Women are sitting under umbrellas in a cafe in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard with fountain. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Palace of Justice on the boulevard Vitosha. The architectural style of the building is eclectic, with different classic elements. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard. In the foreground excavations of the ancient cultural and communication complex Serdika. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard with fountain. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The statue of Saint Sophia, Sveta Sofia. She is considered the protector of the city and the country. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Interior shot of the cathedral Sweta Nedelja. It is a medieval church that was destroyed several times. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The church of Sveta Petka Samardzhiyska, patron saint of saddlers, in the foreground and the cathedral of Sveti Nedelja in Largo Square. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A souvenir shop in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Palace of Justice on the boulevard Vitosha. The architectural style of the building is eclectic, with different classic elements. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The red brick rotunda of Saint George in the historical center of Sofia, called Serdica. The building was built by the Romans in the 4th century as a cylindrical dome. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Alexander Nevsky Cathedral (lr), the Narodno Sabranie, the Parliament of Bulgaria and the Monument to the Tsar Liberator in the center in honor of the Russian Emperor Alexander II. He liberated Bulgaria during the Russian-Turkish War of 1877-78 of Ottoman rule. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The church Sveta Petka Samardzhiyska, patron saint of saddlers, and the statue of Saint Sofia, Sveta Sofia. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: A street in the center with parked cars and illuminated and unlit residential buildings, taken in the evening in the blue hour. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard. In the foreground excavations of the ancient cultural and communication complex Serdika. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: Residents fill in mineral water at the Sofiot thermal spring at the Zentralbad. These taps and fountains are used very actively, especially by older people, to fill their healing mineral water with bottles and canisters or to drink it on site. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on the Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard with fountain. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The statue of Saint Sofia, Sveta Sofia, taken in the evening at sunset. She is considered the protector of the city and the country. The evening sky is reflected in glass panes that protect excavations in the center. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque (L) in the center and the Central Market Hall Sofia on the Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Banya Bashi Mosque in the center on Maria-Luiza-Boulevard. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide

11.09.2018, Bulgaria, Sofia: The Palace of Justice on the boulevard Vitosha. The architectural style of the building is eclectic, with different classic elements. Photo: Jens Kalaene / dpa-Zentralbild / ZB | usage worldwide