Exterior Bench I is built in the Graveyard for 3 Wooden Plank and 5 Bronze Detail. +3 graveyard quality. Unlocked by Graveyard Keeper I. Its construction site needs Building mastery 2: below that, hits do nothing.
It adds 3 to graveyard quality when it stands inside a graveyard area. Each new best graveyard quality also counts towards the Resting Place inspiration. Graveyard Keeper I also unlocks Grave Area I.