As the redevelopment of 2000 began, archaeological excavations were conducted on the site. Finds dated back to the 12th century; a ditch was discovered where the Selfridges store and Park Street car park are now situated. Archaeologists discovered that this was a boundary separating houses from a deer park in an area now occupied by Moor Street station. Rubbish discovered in the ditch was found to include fragments of misfired pottery with criss-cross patterns, indicating that pottery kilns had been located there in the 13th century. Many leather tanning pits dating to the 17th and 18th centuries were found on the Park Street car park site. These contained fragments of crucibles, pottery vessels in which metal was melted. The residues in these were alloys of copper with zinc, lead and tin. On the site where the Indoor Markets are now located, archaeologists discovered further leather tanning pits, these dating from the 13th century.