According to church tradition, it was built in Romanesque style in 1015, although few references exist. The current building was constructed in the florid late Gothic style in the second half of the 14th century and was extensively restored in the late 19th century. It was the second largest church of medieval Buda. The rococo spire of this church is one of the easily seen landmarks of the Buda Castle.

The Church of the Assumption of the Buda Castle , more commonly known as the Matthias Church and more rarely as the Coronation Church of Buda, is a Catholic church in Holy Trinity Square, Budapest, Hungary, in front of the Fisherman's Bastion at the heart of Buda's Castle District. According to church tradition, it was originally built in Romanesque style in 1015, although few references exist. The current building was constructed in the florid late Gothic style in the second half of the 14th century and was extensively restored in the late 19th century. It was the second largest church of medieval Buda and the seventh largest church of the medieval Hungarian Kingdom. It is a historic building with an important history. The last two Kings of Hungary were crowned within its walls: Franz Joseph I of Hungary, and Charles IV of Hungary. The church was also the location of the "Marian Miracle" of Buda. In 1686, during the siege of Buda by the Holy League, a wall of the church - used as a mosque by the Ottoman occupiers of the city - collapsed due to cannon fire. It turned out that an old votive Madonna statue was hidden behind the wall. As the sculpture of the Virgin Mary appeared before the praying Muslims, the morale of the Muslim garrison collapsed and the city fell on the same day.