Green Ensign

The Green Ensign (Irish: An Meirge Uaine) is a historical flag flown by some Irish merchant vessels from the 17th century to the early 20th century. The flag consists of a green field with a golden harp and a canton containing either the English Flag (St George's Cross) or a version of the Union Jack.

This flag has appeared in these historical flag plates:

There remains a lively debate concerning whether the flag had any form of local official status within the British Isles or was simply an informal flag used by some merchant ships.