The One With Ross and Monica's Cousin - S7-E19
Continuity mistake: When Monica comes into Phoebe's apartment for her Surprise Bridal Shower, the view of the hallway outside the apartment is a dead end on the right side (the left side cannot be seen), however, in S7:E12 (The One Where They're Up All Night), both when Phoebe is disposing of the fire alarm and when the fireman is at the door, it is clear that there is another apartment opposite hers, as well as a trash chute on the right side. (00:18:25)
The One With Ross and Monica's Cousin - S7-E19
Continuity mistake: When Cassie shows Ross her freckles on her shoulder, her hand positioning changes between shots.
Answer: The painting doesn't have a name, and if it does it is never mentioned in this episode.