Cromwell's headquarters at the end of the Siege of Pembroke during the English Civil War. The town's main bridge across the River Pembroke, which also acts as a dam, crosses and constrains the millpond. The first bridge was constructed to house a tide mill, originally granted to the Knight's Templar in 1199. The last mill building was destroyed by fire in 1956. On both banks of the Pembroke River to the west of the castle are many remains of early activities. The North Shore Quarries are relatively complete as are the remains of medieval and Elizabethan slipways where wooden vessels were built before the industrial dockyard and admiralty town was built on the grid pattern of Pembroke Dock. There is a very early complete graving dock in what was Hancock's Yard. During the English Civil War, the strategic maritime shire was primarily in the control of the parliamentary forces which aspired to prevent communication to Ireland. At Pennar Flats there was an early submarine base used for experiments in submarine warfare. Three of the houses on the then foreshore, part of the shipyard before the Admiralty Dock Yard was built, are still standing but are heavily altered. The ferry port of Pembroke Dock is to the northwest of Pembroke. It was established in 1814. Geography Pembroke town stands on the South Pembrokeshire limestone peninsula by the estuary of the River Cleddau, flanked on all sides by woodland and arable farmland. The town is south of the county town of Haverfordwest. The town is centred on Main Street, which is the only street that is inside the original Pembroke town walls. Outside the walls, residential estates have been built to the north towards Pembroke Dock, to the east towards Lamphey, and to the south. To the west of the town lies the village of Monkton, which is included as part of the community of Pembroke. At the 2001 census, the community had a population of 7,214. The conurbation of Pembroke Dock and Pembroke has a combined population of 15,890 and as such is one of the major population centres of West Wales. Governance Local government There are two tiers of local government covering Pembroke, at community (town) and county level: Pembroke Town Council and Pembrokeshire County Council. Pembroke Town Council is based at Pembroke Town Hall. The community of Pembroke covers an area of and includes the Pembroke St Mary North,