It is a tradition on Coruscant for newly weds to go the Hall of Heroes and pose in front of the Darth Vader statue. Before they leave, the bride leaves her bouquet at the foot of the statue.
My inspiration for this came from my visit to St. Petersburg, Russia. There is a wonderful statue of Peter The Great on a horse there. After about half an hour in the area, I noticed 3 different newly wed couples posing at the base of it, then leave the bouquet.