Juraj Križanić
Juraj Križanić (c. 1618 – 12 September 1683), also known as Jurij Križanič, Yuriy Krizhanich, Iurii Krizhanich, and Yury Krizanitch (Russian: Юрий Крижанич; Latin: Georgius Crisanius, Czech: Jiří Križanić, French: Georges Krijanich), was a Croatian Catholic missionary and polymath who is often regarded as the earliest recorded pan-Slavist. His ideal, often misunderstood - even today - was to bring about a union of the churches, which Rome and Constantinople had tried to do without success for centuries.