It was restored and electrified in 1986. Open 7am-7pm daily. Parts of its structure date from the thirteenth century, but much of it was reconstructed in the nineteenth century and, like most of the Castle District, the church is a historical mish-mash. When Istanbul, rather than Vienna, ruled Buda, the church was converted into a mosque. The interior is almost cloyingly detailed and includes the entrance to the Museum of Ecclesiastical Art in the crypt.
Open times vary depending on museum.
The former Royal Palace has been destroyed and rebuilt many times. What you see today is a postwar reconstruction of an architectural hotch-potch from the eighteenth, nineteenth and twentieth centuries. This palace was badly damaged during the Turkish siege of 1541 and the area was completely laid waste when recaptured from the Turks in 1686. Empress Maria Theresa caused a new 203-room palace to be built in the late eighteenth century. That battering revealed Gothic and Renaissance foundations, which have been included in the post-war reconstruction.