Church of St. Castulus, Haštalské náměstí, Prague 1

Once upon a time there was a large Romanesque basilica from the 12th century. But its capacity was not enough. That is why it was replaced by this new building in 1375. The new building was occasionally dilapidated, occasionally renovated and upgraded. We can find Gothic, Renaissance and Baroque elements.
There is a hypothesis that the Czech Saint Anežka Přemyslovna could be buried here. Her grave, however, has not yet been found.