What is the origin of the Russian alphabet?

Answer 1

The Cyrillic alphabet was invented around the 9th Century in the First Bulgarian Empire, and was later spread by the church all over eastern Europe, including Russia.

Answer 2

The Russian alphabet is based on the Cyrillic script, which was developed in the 9th century by disciples of the Byzantine brothers Cyril and Methodius. It was introduced to Russia in the 10th century by Saint Cyril. Over the centuries, the Russian alphabet evolved to its modern form, which consists of 33 letters.