San Marco Basilica is a stunning cathedral located in Venice, Italy. Known for its unique blend of Byzantine, Romanesque, and Gothic architectural styles, it features intricate mosaics and a grand façade. The basilica was originally built in the 9th century to house the relics of Saint Mark, the patron saint of Venice. Inside, visitors can admire the breathtaking mosaics that cover the walls and ceilings, depicting biblical scenes and figures. The basilica also houses the famous Pala d'Oro, a golden altarpiece adorned with precious stones. Its rich history and artistic beauty make it a significant landmark in Venice.