National Gallery of Scotland
Read about the true story of Santa Claus at the St. Nicholas Center website and view a gallery of masterpieces starring St. Nicholas (like the one above by Gerard David).
Fra Angelico painted this saint many times, too. Nick was fond of saving children. He wore pink gloves, carried a fancy gold staff and, in some cases, I think he could fly, too. I like this image. It's medieval-ly strange and beautifully painted.