Final answer:
Sant Climent de Taull in northern Spain is celebrated for having Europe's most extensive collection of Romanesque murals, exemplified by the murals from San Clemente, which now reside in the Museum of Catalan Art.
Step-by-step explanation:
Sant Climent de Taull, located in northern Spain, is renowned for its impressive collection of Romanesque murals, which is the most extensive in Europe. The church, which stands in a remote valley in Catalonia, represents the quintessential stone-built architecture of the Romanesque period in this region. An example of the murals can be seen in the apse wall-painting from San Clemente. These murals were originally painted onto fresh plaster that covered the church walls but have since been moved to the Museum of Catalan Art in Barcelona for preservation. Sant Climent de Taull was consecrated in 1123 CE and is celebrated not only for its architecture, which includes semi-circular arches and symmetrical elements, but also for the invaluable artwork that served as religious inspiration for its local worshiping community.