The Market House

The Market House, built in 1820, is a two-storey building that replaced an earlier Market House demolished in 1805. The ground floor was converted into a museum in 1979, while the first floor houses the Holy Cross Chapel, previously known as St Decuman's Mission Church. The building features a rendered exterior and a hipped slate roof topped with a square louvred lantern and a weather-vane.

The Market Street elevation has four windows on the first floor, which are two-light metal casements set in wooden frames with diagonal lead glazing bars. The ground floor includes two plain boarded doors and two three-light shop windows. A double external stone staircase is located at the north-west end, leading to a doorway at the top of the stairs, with a small 'lock-up' situated underneath. The south-east end features a single two-light casement window with diagonal lead glazing bars and a reinstated doorway below it. The elevation facing Nos 27 and 28 Market Street has two large three-light shop windows and two doorways with plain boarded doors. Additionally, there is a timber bollard at the south-east corner of the Market House, which is associated with the nearby dock slip-way.