Córdoba

After the town of Córdoba was re-conquered in 1236, the new Christian leaders were faced with the problem of what to do with giant mosque (Mezquita) in the town, among the largest mosques in Europe, and the legacy of the Muslim rule of Andalusia for several hundred years. Fortunately for posterity (and tourists), rather than the more common destruction of whatever had come before, the mosque was allowed to remain, and a new cathedral was built over and adjacent to mosque. The juxtaposition of Moorish architecture alongside baroque and rococo is amazing!