cuius est solum eius est usque ad coelum et ad inferos

Whose the land is, all the way to the sky and to the underworld is his.

Notes

First coined by Accursius of Bologna in the 13th century. A Roman legal principle of property law that is no longer observed in most situations today. Less literally, "For whosoever owns the soil, it is theirs up to the sky and down to the depths."

Words

usque – all the way, even, up to
sol – sun
inferi – the dead, those down below
infero – be troublesome, bring forth, bring out, enter, put or place on, to carry in, to otherwise bring upon, to say or put forth