Newark-on-Trent or Newark is a market town and civil parish in the Newark and Sherwood district of the county of Nottinghamshire, in the East Midlands of England. It stands on the River Trent, the A1 – on the route of the ancient Great North Road – and the East Coast Main Line railway. The origins of the town are possibly Roman, as it lies on an important Roman road, the Fosse Way. The town grew around Newark Castle, now ruined, and a large market place, now lined with historic buildings. It was a centre for the wool and cloth trades. In the English Civil War, it was besieged by Parliamentary forces and relieved by Royalist forces under Prince Rupert.