If you consider your Lady Love as being akin to the goddess Venus herself, perhaps you'd like to propose to her in the Temple of Venus. This ancient temple sits in the open on the Velian Hill at the east side of the Roman Forum. This is considered to be ancient Rome's largest temple with one side being for Venus, the Goddess of Love, and the other side for Roma Aeterna--Eternal Rome. It's a fantastic place to make your own history by pledging your love to your Venus for as long as Rome lasts.
After all, when in Rome, do as the Romans do... live and love to the fullest!
Give me your hand and we will run together our whole lives.