Andrei I. Pliguzov (1956–2011) was a historian of Kyivan Rus’ and an expert in church history, with a focus on sources from the fourteenth to the sixteenth century. He was the author of numerous publications on a variety of topics, including the Battle of Kulikovo, the Union of Florence, the Time of Troubles, early modern Old Belief, and the place of ethnic minorities in the Russian imperial imagination.