The Church of the Most Sacred Heart of Our Lord, a Roman Catholic church in Prague's Vinohrady district. It was built between 1929 and 1932 and designed by the Slovene architect Jože Plečnik. It is considered one of the most significant Czech religious constructions of the 20th century. In the wide 42 m high tower wall is a huge, 7.5 m diameter glazed clock (the largest in the Czech Republic). Since 2010, the church has been ranked among national cultural monuments.