The Matthias church is on Szentharomsag utca in the castle district of old Buda. Although extensively rebuilt in the 1890s, it is a beautiful gothic church with a colourfully patterned roof and some excellent murals. The church is a focal point for Hungarian nationalism as it was here that Hungary's kings were traditionally crowned and where Franz Liszt (or Liszt Ferenc as they say in Magyar) first performed his Coronation Mass in 1867. Although the real Crown of St Stephen is in a heavily guarded vault in the National Museum, there is an excellent replica in the Museum of Ecclesiastical Art within Matthias Church along with a detailed account of the extensive scientific research which has been carried out in the effort to date the Hungarian crown.