The Mahoney coat of arms.
The Book of Kells is a 8-9th century illuminated celtic manuscript kept at Trinity College in Dublin.
The Web Museum has lots of nice pictures and good information and is a totally virtual museum.
The Smithsonian is more than just a single museum. This is actually the home page for all the various Smithsonsian museums and affiliated institues.
The Louvre is France's (and perhaps the world's) most famous art museum.
Hide and Seek (1877) is a painting by James Jacques Tissot, a French Impressionist painter and one I've always liked a great deal.
This detail is from The Twelve Dancing Princesses, a painting by Ruth Sanderson.
Boston Common at Twilight, a painting by Childe Hassam, an American, is another favorite of mine.
Umbrellas in the Rain, a painting by Maurice Prendergast, an American, is picture of St. Mark's Square in Venice..
Photo.net has a lot of neat stuff on it.
Easter Lunacy - Every year my old roommates had an Easter Egg Hunt; this year they took pity on me and had it outside. It's always amazing to watch so many adults charging after plastic eggs full of candy. (Particularly since there's always more candy than anyone needs leftover from filling the eggs...)
On Patriot's Day, I watched the reenactment of the Battle of Lexington.
A friend of mine thinks period costumes are cool. They are. She forwards me links periodically. (Yeah, yeah, I'll finish the html eventually.)
Mer's Picture Gallery has lots of nice stuff drawn in Photoshop.