- mother of Constantine I.
- a city in and the capital of Montana, in the W part.
- a female given name, form of Helen.
- a city in W Montana: the state capital. Pop: 26 718 (2003 est)
- Saint. ?248–?328 ad, Roman empress, mother of Constantine I. After converting to Christianity (313) she made a pilgrimage to the Holy Land (?326) where she supposedly discovered the cross on which Christ died. Feast day: May 21
