Wedding Ceremony: Must the Bride Stand on the Left?

Why does the bride always seem to stand to the groom’s left at the altar?

It is customary for the bride to stand to the left at the altar. The tradition actually stems from the old days of “marriage by capture”, when the groom needed to leave his right hand (his fighting hand) — which he used to hold his sword — free in the event that he should need to defend his bride from other suitors who may try to wisk her off at the last minute. Pretty dramatic?