The Bullring is a major commercial area of central Birmingham. It has been an important feature of Birmingham since the Middle Ages, when its market was first held. Two shopping centres have been built in the area; in the 1960s, and then in 2003; the latter is styled as one word, Bullring. The site is located on the edge of the sandstone city ridge which results in the steep gradient towards Digbeth. The slope drops approximately 15 metres (49 ft) from New Street to St Martin's Church. The centre has been a huge success, attracting customers from all over the world.