Oranges and Lemons is an old English nursery rhymes which associates the chimes of various London churches with different phrases.

In most versions of the song, the phrase 'oranges and lemons' is associated with 'St Clements'. This may either be the church of St Clement (of the) Danes in the Strand, or St Clements Eastcheap. Both were situated close to wharves where imports of citurs fruit were offloaded, and St Clement was the patron saint of mariners, haing been martyred by being thrown into the sea with an anchor tied to his neck.

St Clement Danes was reputedly founded in the 9th Century CE by Danes resident in London who were forced to accept Christianity. It was rebuilt by William I in the 11th Century, then again by Wren after the Great Fire, only to be destroyed in the London Blitz. The Royal Air Force provided funds for the restoration and the church was reconsecreated as the RAF central church in 1958. Since 1919, a special service for children has been held there every April, at which oranges and lemons are given to the children attending.

Just a little lemony folklore from Old England!