altar
al·tar
/ˈɑːltɚ/ noun , pl -tars [ count ]
1 : a raised place on which sacrifices and gifts are offered in some religions
— sometimes used figuratively
She sacrificed honesty on the altar of success. [=she chose to be dishonest in order to achieve success]
2 : a platform or table used as a center of worship in Christian ceremonies and services
led to the altar
◇ If you are led to the altar, you get married.
They started a romance that eventually led (them) to the altar.
left at the altar
◇ If you are left at the altar, you do not get married because the person you were going to marry has decided against it at the last moment.
Her fiancé left her at the altar.