Let Erin remember the days of old,
Ere her faithless sons betray'd her;
When Malachi wore the collar of gold,
Which he won from her proud invader,
When her kings, with standard of green unfurl'd,
Led the Red-Branch Knights to danger!
Ere the emerald gem of the western world
Was set in the crown of a stranger.

On Lough Neagh's bank as the fisherman strays,
When the clear cold eve's declining,
He sees the round towers of other days
In the wave beneath him shining:
Thus shall memory often, in dreams sublime,
Catch a glimpse of the days that are over;
Thus, sighing, look through the waves of time,
For the long-faded glories they cover.

Thomas Moore

http://www.poemhunter.com/poem/let-erin-remember-the-days-of-old-2/