The Queen visited the Tower of London on Friday to mark the end of a £20m renovation project.
The Queen unveiled a plaque to mark the work's completion
It is the last stage of an eight-year scheme to improve the approach to one of London's most famous buildings, founded after the Norman Conquest.
A new public space and visitor centre are among new additions and an historic road has been recreated.
Three earlier phases saw the underpass upgraded, the riverside wharf restored and an education centre for the Tower.
Historic Royal Palaces, which runs the Tower, helped fund the project, along with late US philanthropist John Paul Getty II, the Heritage Lottery Fund and the Pool of London Partnership.
The Queen and the Duke of Edinburgh unveiled a plaque to mark the completion of the work.
The Queen had her photograph taken with 29 Yeoman Warders - or Beefeaters - and an axe which dates back to the 1530s.
The axe is said to have accompanied two of Henry VIII's wives, Ann Boleyn and Catherine Howard, to their trials before being beheaded at the Tower.