Activists block the traffic on a one of busy streets in Kiev on August 10, 2018, to attract attention of the city's authorities to the problem of flooding of archaeological artifacts at the site of excavations in the historic center of the Ukrainian capital and as well demand to found the museum on that place. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Activists block the traffic on a one of busy streets in Kiev on August 10, 2018, to attract attention of the city's authorities to the problem of flooding of archaeological artifacts at the site of excavations in the historic center of the Ukrainian capital and as well demand to found the museum on that place. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Activists block the traffic on a one of busy streets in Kiev on August 10, 2018, to attract attention of the city's authorities to the problem of flooding of archaeological artifacts at the site of excavations in the historic center of the Ukrainian capital and as well demand to found the museum on that place. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

A woman holds a placard reading "Respect for the past is what distinguishes education from ignorance" along with other activists during a blockade of the traffic on a busy street in Kiev on August 10, 2018, to attract attention of the city's authorities to the problem of flooding of archaeological artifacts at the site of excavations in the historic center of the Ukrainian capital and as well demand to found the museum on that place. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Activists block the traffic on a busy street in Kiev on August 10, 2018, to attract attention of the city's authorities to the problem of flooding of archaeological artifacts at the site of excavations in the historic center of the Ukrainian capital and as well demand to found the museum on that place. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Activists are pictured at the archaeological excavations site in Kiev on August 10, 2018. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Activists are pictured at the archaeological excavations site in Kiev on August 10, 2018. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

An activist makes a picture at the archaeological excavations site in Kiev on August 10, 2018. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Activists are pictured at the archaeological excavations site in Kiev on August 10, 2018. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)

Heavy traffic jam was formed as activists block the traffic on a busy street in Kiev on August 10, 2018, to attract attention of the city's authorities to the problem of flooding of archaeological artifacts at the site of excavations in the historic center of the Ukrainian capital and as well demand to found the museum on that place. - During the construction of an underground shopping mall on Poshtova Square in Kiev in 2015 were found the part of the ancient street and a large number of artifacts of Kievan Rus times VI-XII centuries. (Photo by Sergei SUPINSKY / AFP)