Historical sites of the Russian monumental art, due to
their centuries-long life, undergo inevitable changes in color
and structure of frescoes, destruction or alteration of the
original architecture. Numerous natural, climatic and
anthropogenic reasons bring about significant changes,
partial or complete destruction of works of art. Despite the
fact that it has been 65 years since the end of the Second
World War, many ancient Russian art masterpieces still have
not been restored to an acceptable display state. A
considerable amount of materials is stored in museums
waiting to be reinstalled in interiors of churches.