The Heaven Tree Trilogy

This is a gorgeous story set in England and Wales in the 13th century. The first book in the trilogy was originally meant to be the whole story, and it could stand by itself...but I'm glad it doesn't. The story follows Harry Talvace, a young man of a good Norman family in England, who renounces his heritage to become a mason and becomes entangled in a love triangle when he agrees to build a church for the English nobleman Ralf Isambard. The history and politics of England and its relations with Wales at the time play a role in the story, and there is a truly great villain.