This UNESCO landmark is considered to be one of the most significant secular Gothic buildings in Europe. It was built between 1482 and 1533 on the site of an earlier oil exchange. The Llotja consists of four distinct parts: the Sala de Contractació (Trading Hall), also known as the Saló Columnari (Hall of Columns); the Sala Consulado del Mar with its magnificent ceiling; the unfinished Torre (tower) with its debtor prison (temporarily closed to visitors), and the Pati dels Tarongers (Patio of Oranges). Some of the Gothic gargoyles are quite naughty.