Holy Trinity Church is a castle and a 16th century Catholic church located in the city of Brest. It is considered a monument of Belarusian architecture with elements of Gothic Revival and defensive architecture. A distinctive feature of the church is a three-tiered, four-sided bell tower with a sloping roof, separated from the temple building, which stands to the northwest of the temple on a high pedestal. The Trinity Church is where the icon of the Virgin Mary, which was moved deep into Russia during the First World War and later lost, is kept.