"You've never been to Tenebrae, I suppose?"
The triangular candelabrum known as a 'hearse' which is used for Tenebrae services
Creative Commons Attribution Share AlikeThe triangular candelabrum known as a 'hearse' which is used for Tenebrae services - Credit: Bhuck, Wikimedia Commons

In the Roman Catholic Church, Tenebrae (Latin for 'shadows' or 'darkness') is the name given to certain ceremonies which take place during the last three days of Holy Week: Maundy Thursday, Good Friday and Holy Saturday.

The climax of these ceremonies is the gradual extinction of  15 candles, after which the church is left in darkness.

Tenebrae is also the name given to Holy Week services in other Christian denominations.