I visited Cordoba a couple of years ago and that city was a perfect example, pre Inquisition, of just how well the three religions co-existed together drawing on each other's learnings and expertise. Many Muslim artisans worked on the design of the Seville cathedral bell tower for example, the inspiration of which was drawn from the Moorish minaret. It was a golden age for philosophy, theology mathematics, medicine, physics etc., until all that was lost once the Inquisition kicked in and Spain regressed, destroying much Arabic learning deemed as heresy. Eventually expelling all their Muslim and Jewish citizens. There is the remains of a pre Inquisition synagogue in Cordoba which interestingly looks quite Arabic and The Mezquita Mosque is simply stunning.