Cenotaph for Archduchess Maria Christina of Austria sculpted by Antonio Canova , in 1805 . The St . Augustine's Church (Augustinerkirche) is a parish church located on Josefsplatz . Originally built in the 14th century as the parish church of the imperial court of the Habsburgs , the Gothic interior was added in the 18th century . The city centre was designated a UNESCO World Heritage Site . Vienna (capital) . Republic of Austria .