Yaroslav FedorukYaroslav Fedoruk is a senior scholar at the Mykhailo Hrushevsky Institute of Ukrainian Archaeography and Source Studies, National Academy of Sciences of Ukraine, Kyiv. A specialist in seventeenth-century international relations, he has published manystudies of Bohdan Khmelnytsky’s foreign policy, including The Treaty of Vilnius (1656): The East European Crisis and Ukraine in the Mid-Seventeenth Century (2011; in Ukrainian). He is also editor of Ukraïns'kyi arkheohrafichnyi shchorichnyk (Ukrainian Archaeographic Annual, Kyiv). Read More Read Less