Dozens of churches, historical sites and museums have been damaged by the Russian invasion of Ukraine, the UN cultural agency said on Friday, adding that it was particularly worried about the northern city of Chernihiv. UNESCO said last month it had bolstered protective measures for Ukraine’s endangered cultural heritage in light of Russia’s invasion, such as using a “Blue Shield” emblem to mark its cultural sites and monuments. “We are very concerned about both the situation at the humanitarian and (cultural) heritage levels. Humanity’s heritage is in danger (in Ukraine),” Ernesto Ottone, UNE…