This postcard is from the An Post Museum which is located in Dublin's historic GPO. The exhibit, "Letters, Lives & Liberty" is an interactive exhibit which tells the history of the Post Office in Ireland. The cool thing about this postcard is that it was signed by several Postcrossers in Ireland who had a 'Postcrossing Meet-up" on May 26. I'm envious!
Probably not chosen on purpose, but I like how the stamp is color coordinated with the card. It shows a common frog and is one in a series of Irish Animals and Marine Life.
Postcrossing card #55