The Mosque-cathedral of Córdoba (Spanish: Mezquita–catedral de Córdoba), whose ecclesiastical name is the Cathedral of Our Lady of the Assumption is the Catholic Christian cathedral of the Diocese of Córdoba dedicated to the Assumption of the Virgin Mary. The structure is regarded as one of the most accomplished monuments of Moorish architecture. It originally was a Catholic Christian church built by the Visigoths, on the ruins of a Roman temple dedicated to Janus. When Muslims conquered Spain in 711, the church was first divided into Muslim and Christian halves. This sharing arrangement of the site lasted until 784, when the Christian half was purchased by the Caliph 'Abd al-Rahman I, who then proceeded to demolish the entire structure and build the grand mosque of Cordoba on its ground. After the Reconquista, it was converted to a Roman Catholic church. The best part of this story is that the Mosque was not destroyed but rather the Cathedral was built within.
I have seen similar pictures and was in awe but guess I never paid all that much attention to their location. I was dumbfounded when we walked into this church and could not stop capturing their beauty from ever angle possible. WOW!