Canonization
After the death of Macarius, a wooden church was built over his grave, and the Unzha monastery was named after him. The locals often reported being miraculously healed of various diseases after visiting his grave; his help was said to have repelled a Tatar invasion, and later, during the Time of Troubles, to protect the region against the Polish troops. The fame of the founder attracted pilgrims and novices to the monasteries, helping its growth.
When Feodor Romanov, the father of Russia's new Csar Michael, is enthroned as Patriarch Philaret of Moscow in 1619, he sends a commission to the Unzha to investigate the miracles. He mentions these miracles as confirmed in his letter to his son the Csar in September 1619, and encourages Michael to visit Macarius' Unzha Monastery in fulfillment of the vow he had given earlier (which Michael promptly does). It is thought that it was at that time that Venerable Macarius was canonized by a Sobor of the Russian Orthodox Church, which made his veneration nation-wide.
Read more about this topic: Macarius Of Unzha