Conversation so far:
Is marriage-a-la-mode a set of pictures?
In 1743–1745, William Hogarth painted the six pictures of Marriage Marriage A-la-Mode, a pointed skewering of upper-class 18th-century society.
What does Marriage A-la-Mode depict?
This moralistic warning shows the miserable tragedy of an ill-considered marriage for money.

Question: When did he finish it?
Self-contained rewrite: When did William Hogarth finish it?