The centre of town is the market place, with its market cross, and the relatively modern Northumberland Hall, used as a meeting place. Surrounding the market place are the main shopping streets: Narrowgate, Fenkle Street, and Bondgate Within. The last of these is a wide road fronted by commercial buildings. In medieval times, Alnwick was a walled town, although due to fluctuating economic conditions during the Middle Ages, the walls were never completed. Hotspur Tower, a medieval gate, is extant, dividing Bondgate Within from Bondgate Without, and restricting vehicles to a single lane used alternately in each direction. Pottergate Tower, at the other side of the town, also stands on the site of an ancient gate, but the tower itself was rebuilt in the 18th century. Its ornate spire was destroyed in a storm in 1812. Outside the line of the walls, the old railway station building is relatively ostentatious for such a small town, due to its frequent use by royal travellers visiting Alnwick Castle. It is now a large secondhand bookshop.