The church of Trakai was not damaged during World War II, but it was decided to hide the most important valuables from its treasury. The most valuable items were buried inside the church. Among them was the great monstrance and golden crowns of Mother of God painting. The hiding place was opened in 1975 during the renovation of the church. A part of Trakai chuch treasure is now preserved in the Church Heritage Museum.

The painting of the Blessed Virgin Mary is one of the earliest and most venerated images in Lithuania. The legend says it was a gift from  Byzantine emperor to Vytautas, the Grand Duke of Lithuania. Accounts of special graces and miracles associated with the painting date back to the beginning of the 17th century.