On April 5 (15), 1684 in Swedish Livonia in a family of peasants was born Marta Samuilovna Skavronskaya, the second wife of Peter the Great, future empress of Russia Catherine I (Yekaterina Alexeevna).
Every year on 15 April in Russia and many countries of the world celebrate the International Day of Culture, established in honour of the adoption on 15 April 1935 of the Roerich Pact - the first international legal act for the protection of cultural property.