Very much a Spanish city during the colonial era, the narrow streets of the city centre are organised in a grid, reflecting the Andalusian culture that is embodied in the architecture of the city's great houses and numerous convents and churches. Sucre remains the seat of the Roman Catholic Church in Bolivia, and a common sight is members of religious orders dressed in traditional habit. For much of its colonial history, Sucre's temperate climate was preferred by the Spanish royalty and wealthy families involved in silver trade coming from Potosí. Testament to this is the Glorieta Castle. Sucre's University (Universidad Mayor Real y Pontificia de San Francisco Xavier de Chuquisaca) is one of the oldest universities in the new world.