Catedral de la Almudena
The Almudena Cathedral is the most important religious building in Madrid. On June 15, 1993, its construction began on April 4, 1883 when King Alfonso XII laid the first stone. The interior of La Almudena surprises by having completely different details to other cathedrals: the ceiling and the stained-glass windows set aside the classic style to give way to bright colours and straight lines.