“TheWhiteRabbit” thought we might enjoy this hymn, which they sang at his church this Sunday: Holy God, We Praise Thy Name. This one goes all the way back to the 4th century, when it was sung in Latin as Te Deum. German lyrics came only in the 1700s, and English later, so now it’s sung in churches the world over.
I can’t think of any older hymns than this, still being sung. Can you?