and is open to the public. The castle includes the regimental museum of the Royal Welch Fusiliers. Caernarfon town walls The medieval town walls, including eight towers and two twin-towered gateways, form a complete circuit of around the old town and were built between 1283 and 1285. The walls are in the care of Cadw but only a small section is accessible to the public. The town walls and castle at Caernarfon were declared part of a World Heritage Site in 1986. According to UNESCO, the castle and walls together with other royal castles in Gwynedd "are the finest examples of late 13th century and early 14th century military architecture in Europe". Church of St Peblig, and Segontium Roman Fort Dedicated to Saint Peblig, the son of Saint Elen and Macsen Wledig (Magnus Maximus), the church is built on an important early Christian site, itself built on a Roman Mithraeum or temple of Mithras, close to the Segontium Roman Fort (200m away, in the care of Cadw). A Roman altar was found in one of the walls during 19th-century restoration work. The present church dates mainly from the 14th century and is a Grade I listed building. Statue of David Lloyd George The statue in Castle Square was sculpted by W. Goscombe John and was erected in 1921 when Lloyd George was Prime Minister. David Lloyd George was the Member of Parliament for the area from 1890 to 1945. The Old Market Hall The Old Market Hall in Hole-in-the-Wall Street and Crown Street was built in 1832, but the interior and roof were rebuilt later in that century. It is a Grade II listed building. It now acts as a pub and music venue. Morfa Common Park A small Victorian urban park, Morfa was laid out in 1888. It stands to the south of the town, bordered by the 'Ysbyty Eryri' hospital [see below] at its southern edge. It is listed at Grade II on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales. Others The old County Hall, which went on to become a courthouse, is situated inside the castle walls, next door to the Anglesey Arms Hotel. The old courthouse was built in the Neo-classical style. The courthouse was replaced by the new Caernarfon Criminal Justice Centre on the former Segontium School site in Llanberis Road in 2009. The old courthouse adjoins what used