Roofbox

A roofbox is a specially contrived opening above a doorway, usually built for some astronomical significant event.

The term was coined by Professor Michael O’Kelly during his excavation of the Newgrange passage cairn, at Brú Na Bóinne, Ireland.

The roofbox was built directly above the entrance door to the passage. The passage and chamber were specifically aligned with the rising sun of the mornings around the winter solstice in December. The 17 metre passage rises in elevation as it leads to the chamber.