This is the front of the Catedral Metropolitana de Buenos Aires. It looks like a museum or a mausoleum but no, it’s a church.
“The Cathedral of Buenos Aires was rebuilt several times since its humble origins in the 16th century. The present building is a mix of architectural styles, with an 18th-century nave and dome and a severe, 19th-century Neoclassical façade without towers. The interior keeps precious 18th-century statues and altarpieces, as well as abundant Neo-Renaissance and Neo-Baroque decoration.”