To celebrate the day the whole world is Irish, here are some images of Dublin and environs from the turn of the 20th Century, posted recently on Flickr by The Library of Congress.

[St. Stephen's Green Park, Dublin. County Dublin, Ireland] (LOC)

Stephen’s Green

[Sackville Street and O'Connell Bridge, Dublin. County Dublin, Ireland] (LOC)

O’Connell Street Bridge

[Phoenix Park, Dublin. County Dublin, Ireland] (LOC)

Pheonix Park

[Killiney and Dalkey. County Dublin, Ireland] (LOC)

Dalkey

[Howth and Ireland's Eye. County Dublin, Ireland] (LOC)

Howth and Ireland’s Eye

Also, Flickrers are posting fun Then & Now shots.