What music, written by a German, has been an integral part of every coronation of British monarchs since 1727?

"Zadok the Priest" has been used in every British coronation since George II.


https://www.britannica.com/topic/Zadok-the-Priest

"Zadok the Priest" was composed by George Frideric Handel. Handel, a German-born composer who later became a British citizen, wrote the piece for the coronation of King George II. It is one of four coronation anthems he composed for the occasion and is based on a passage from the Bible, specifically 1 Kings 1:38-40, which describes the anointing of King Solomon.

Here are three examples at three different coronations:

Charles III
https://www.youtube.com/watch?v=Sm_PNbQebdA

Elizabeth II
https://www.youtube.com/watch?v=Y3qH0rpwwe4

George VI
https://www.youtube.com/watch?v=pROTbJ0vSKU