Defying gravity, Brick vaulted dome ceiling, built free standing without supports/formwork

Domed vault, unsupported masonry, Brick, Brickwork, Dome, Catalan vault, unsupported masonry. I built these two buildings in my garden. The Hobbit house with semicircular domed ceiling and pizza oven inside; and the gallery with a Catalan styled brick vault. Both vaults are built without formwork or any supports. They are both built with Hot mixed lime mortar. There is no cement.