hidden Ioann of Kronstadt (Sergiyev) (1829-1908), Saint, clergy figure Ioann of Kronstadt (Ivan Ilyich Sergiyev; 1829-1908), Saint, clergy figure. Ioann of Kronstadt was a famous preacher and ecclesiastical writer. He graduated with honours from the Arkhangelsk Ecclesiastical College, Seminary in 1851 and the St.... more