The Lovers: King Nebuchadnezzer II of Babylon, and his wife Amytis of Media.
The Gesture: One heck of a backyard. Amytis was raised in the forested Median Empire before moving to her husband's home in Babylon, and she pined for her homeland with its lush foliage. Nebuchadnezzer soothed her homesickness by building an enormous, hanging botanical garden with many imported plants. So if your lover is ever homesick, you know what to do! Just don't forget to become a Babylonian emperor first.