The Mosque-Cathedral of Córdoba is one of the most emblematic monuments of Islamic and Christian architecture in Spain. Built in the 8th century, it was originally a mosque commissioned by Abderraman I over the old Basilica of San Vicente, which was shared for a time by Christians and Muslims. After the Reconquista, it was converted into a cathedral, combining Gothic, Renaissance and Baroque styles. Its interior is known for its 856 marble columns and two-tone horseshoe arches, creating a unique visual effect. The building is made up of two main areas: the courtyard with the old minaret and the prayer hall. Through successive extensions, the Mosque-Cathedral has become a living reflection of the cultural fusion of the Iberian Peninsula. A World Heritage Site since 1984, it is a testament to the coexistence and historical complexity of Islamic and Christian cultures in Córdoba.