The Romans built a road along the north bank of the River Thames westwards through the gate later called Lud Gate as part of the fortifications of London. Guarding the road from the west, it led to the Romans' main burial mound in what is now Fleet Street. It stood almost opposite what is now St Martin's Church on what is now called Ludgate Hill. The site of the gate is marked by a plaque on the north side of Ludgate Hill, halfway between Ludgate Circus and St Paul's Cathedral.