Shipping tycoon Robert Hooper got his nickname “King” because he treated his sailors so well, but it’s easy to think it was because he lived like royalty. Around the corner from the home of Jeremiah Lee (whose sister-in-law was the second of Hooper’s four wives), the 1728 mansion gained a Georgian addition sometime after 1745. The Marblehead Arts Association stages exhibits in four galleries, schedules special events, and sells members’ work in the gift shop. The mansion has a lovely garden; enter through the gate at the right of the house.