There seems to be two explanations for this tradition where the groom carries
his bride over the threshold when entering their home as a married couple for
the first time.
The first is to protect the bride from evil spirits
belief of carrying the bride over the threshold stems from the same belief
that aroused the idea of the runway carpet and strewing the aisle with
flowers and petals. It was an ancient belief that the newly married couple
was very susceptible to evil spirits. A protective layer between the bride
and the ground were provided by carrying her, and thus protecting her from
The second explanation relates to Roman times when it was believed
that if the bride stumbled when entering the newlywed's home for the first
time, it would bring bad luck and harm to their marriage.
Carrying the bride across the threshold was thought to prevent this from
Tradition dictates the new wife must enter her home by the main
door and, to avoid bad luck, she must never trip or fall--hence the custom
that a bride should be carried over the threshold.