Somerset House is a large Neoclassical complex situated on the south side of the Strand in central London, overlooking the River Thames, just east of Waterloo Bridge. The Georgian era quadrangle was built on the site of a Tudor palace originally belonging to the Duke of Somerset. The present Somerset House was designed by Sir William Chambers, begun in 1776, and was further extended with Victorian era outer wings to the east and west in 1831 and 1856 respectively. The site of Somerset House stood directly on the River Thames until the Victoria Embankment parkway was built in the late 1860s.

The Strand Lane Baths, at 5 Strand Lane, London WC2R 2NA, have been reputed since the 1830s to be a Roman survival. They are in fact the remaining portion of a cistern built in 1612 to feed a fountain in the gardens of the old Somerset House, then a royal place. After a long period of neglect and decay, following the demolition of the fountain, they were brought back into use in the 1770s as a public cold plunge bath, attached to No. 33 Surrey Street. The idea that they were Roman probably began some fifty years later as an advertising gimmick, and has aroused both enthusiasm and scepticism ever since.