The Chapel Royal

There has been a chapel at Dublin Castle since at least 1242.

The current chapel was designed by Francis Johnston and opened as the Anglican chapel of the Viceroy on Christmas Day 1814. Despite being smaller than Johnston's nearby General Post Office, it was equally expensive to build. It became known as the Chapel Royal after King George IV attended a service there on September 2, 1821.

After Irish independence in 1922, it lay dormant before becoming a Roman Catholic church in 1943. It is now deconsecrated. The galleries and stained glass windows are ornamented with coats of arms representing many of Ireland's Viceroys. The arms of the last Viceroy, Lord FitzAlan Howard, filled the very last available space in the last available window when they were installed in 1922.