The earliest known bridge on the site of London Bridge was built by the Romans in the 1st century AD, during the reign of Emperor Claudius. This bridge was made of wood, and was probably located a little upstream from the present bridge. It is thought to have been destroyed in a fire in 60 AD.
Medieval period
The next bridge on the site of London Bridge was built in the 12th century, during the reign of King John. This bridge was made of stone, and was lined with houses and shops. It was also the site of a number of executions, including that of William Wallace in 1305.
Tudor and Stuart periods
The medieval bridge was replaced in the 16th century, during the reign of Henry VIII. This bridge was also made of stone, and was wider and more elaborate than its predecessor. It was also the site of a number of important events, including the Battle of London Bridge in 1642, during the English Civil War.
Modern period
The Tudor bridge was replaced in the 19th century, during the reign of Queen Victoria. This bridge was made of iron and was designed by John Rennie. It was opened in 1831, and was one of the first iron bridges in the world.
Current bridge
The current London Bridge was built in the 1970s, during the reign of Queen Elizabeth II. This bridge is made of concrete and was designed by Peter Hendy and Chris Wise. It was opened in 1973, and is the latest in a long line of bridges that have spanned the River Thames at this point.