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The great domed cathedral of St Paul's, designed by Sir Christopher Wren to replace the Gothic medieval cathedral destroyed in 1666 in the Great Fire of London, was built between 1675–1710. Of the most famous London sights, St Paul's is the one most conveniently located for the Barbican. It's a significant building in British history, having been the site of the funerals of several British military leaders (Nelson, Wellington, Churchill), and significantly held peace services marking the end of the two world wars. The cathedral is also famous for its Whispering Wall, as well as its stunning view over the city. The crypt is also open to the public, holding the tombs of Nelson, Wellington and Christopher Wren. It is possible to sidestep the admission charge by entering for one of the midday services, even if you don't take part, or for the daily choral evensong in the late afternoon. However, you'd still need a ticket to get to the top. Photography is not allowed.

This is probably the most famous criminal court in the world, and has been London's principal criminal court for centuries. It hears cases remitted to it from all over England and Wales as well as the Greater London area. The present building dates largely from 1907 (a new block was added from 1970 for more modern facilities) and stands on the site of the infamous medieval Newgate Gaol. The Central Criminal Court is of course best known today for its association with John Mortimer's Rumpole of the Bailey character, novels and television series. Daily case listings are available at The law pages. No bags, cameras, drinks, food or mobile phones—no facilities for safekeeping. Children under 14 are not admitted.

Postman's Park is three parks combined, bringing together the gardens of St Botolph's Aldersgate, Christ Church Greyfriars and St Leonard, Foster Lane. One of the largest parks in the City of London, Postman's Park contains the Memorial to Heroic Self Sacrifice; a memorial to ordinary people who died saving the lives of others and might otherwise have been forgotten.

A medieval church that was rebuilt in the late 18th century, noted for its well-preserved interior. The former churchyard was converted into a public space in 1880, called Postman's Park as it was frequented by workers from the nearby Post Office headquarters.

Quirky medical museum. Only open to the public for scheduled evening events.

Grade I listed Saxon church founded before the 12th century. The exterior was mostly constructed in the 15th century, and the interior in the 19th. The north side of the church houses a musician's chapel opened in 1955. In addition to the services, there are often evening (chargeable) concerts.