Stoglav

[1] The book is shaped in the form of answers to some 100 questions posed by Ivan IV of Russia.

The Book of Hundred Chapters canonized the native Muscovite rituals and practices at the expense of those accepted in Greece and other Eastern Orthodox countries.

As a result this church code was never accepted by the Russian monks residing on Mount Athos.

[2] In the mid-17th century, the Old Believers championed the Stoglav in order to undermine Patriarch Nikon's authority and his ecclesiastical reforms.

The Great Moscow Synod of 1667 condemned the Stoglav and its practices as heretical and banned the book from usage for 200 years.