There are many prehistoric sites in Pembrokeshire, particularly in the Preseli Mountains. During the Middle Ages several castles were built by the Normans, such as Pembroke and Cilgerran, and St David's Cathedral became an important pilgrimage site. During the Industrial Revolution the county remained relatively rural, with the exception of Milford Haven, which was developed as a port and Royal Navy dockyard. It is now the UK's third-largest port, primarily because of its two liquefied natural gas terminals. The economy of the county is now focused on agriculture, oil and gas, and tourism.
there are many prehistoric sites in pembrokeshire particularly in the preseli mountains during the middle ages several castles were built by the normans such as pembroke and cilgerran and st david's cathedral became an important pilgrimage site during the industrial revolution the county remained relatively rural with the exception of milford haven which was developed as a port and royal navy dockyard it is now the uk's third-largest port primarily because of its two liquefied natural gas terminals the economy of the county is now focused on agriculture oil and gas and tourism