The Basilica of Our Lady of Atocha is a prominent Roman Catholic church located in Madrid, Spain. It is dedicated to the Virgin of Atocha, the patron saint of the region. The basilica features a blend of architectural styles, primarily Mudejar and Baroque, and is known for its beautiful altarpiece and intricate decorations. Originally built in the 16th century, the basilica has undergone several renovations over the years. It serves as a pilgrimage site for many devotees who come to pay their respects to the Virgin of Atocha. The church is also an important cultural landmark in Madrid.