The Astolat Dollhouse Castle was inspired by Alfred Tennyson 's poetry about the Lady of the Lake and built between 1974 and 1987 by miniaturist Elaine Diehl. It was appraised over $1 million in 2006 and at $8.5 million in 2015 primarily because of the upgrade to the interiors and pieces. It is 9' tall, has 29 rooms and is on display at the Nassau County Museum of Art on Long Island, New York. The Colleen Moore fairy Castle Dollhouse and the Astolat Dollhouse Castle were designed with fixed contiguous exterior walls to create a three-dimensional viewing effect.