The town is believed to have been a salt-producing centre from the 10th century or earlier. The Norman castle was built at the crossing of the Weaver before 1180, probably near where the Crown Inn now stands. Although nothing remains of the castle above ground, it affected the town's layout. During the medieval period, Nantwich was the most important salt town and probably the second most important settlement in the county after Chester. By the 14th century, it was holding a weekly cattle market at the end of what is now Beam Street, and it was also important for its tanning industry centred in Barker Street.