The conversion of Katarinastation, a former power station, into Stockholm's first mosque led to heated architectural debates. Prior to its inauguration in 2000, Stockholm's Muslim community worshipped in cellars and other cramped spaces, jokingly claiming to be Sweden's biggest underground movement. Ferdinand Boberg, the architect behind Rosenbad (which houses the offices of the prime minister) and the NK department store, designed Katarinastation. Inspired by Andalusian Moorish architecture, he decorated the lofty main hall in mosaic brick, with floor-to-ceiling vaulted windows. Fittingly, the original structure faces Mecca. As long as shoes are removed and women covered up (robes provided), visitors may view the prayer hall and lecture hall. Before you leave take a look at the massive copper doors facing Östgötagatan embedded with numerous mundane objects by the process of blast-moulding.