Eiffel Tower

Bustereiffel — A photo of Buster visiting the Eiffel Tower

D.W. Bossy Boots 51 — Emily's Eiffel Tower cake

4th Grade Class 2 — Prunella's model of the tower, which at this point in the episode isn't in good condition

The Eiffel Tower is a famous tower in Paris, France. It has received a wide variety of references in the Arthur series:

In "Sue Ellen Moves In" we see a flashback of Brain building the Eiffel Tower out of snow.
In "Fern's Slumber Party" Fern's mother made cookies of famous landmarks. Francine passed them out; the Eiffel Tower was one of the cookies on the plate.
In "Buster's Back," there is a photo of Buster in front of the Eiffel Tower in Arthur's room.
In "The World Record," when Buster imagines going around the world walking backwards, he fantasizes himself walking in France past the Eiffel Tower.
In "Pet Peeved," to demonstrate the importance of following instructions, the opening depicts the crew of the Eiffel Tower building it sideways because they didn't follow the plan.
When Muffy is on a train in her fantasy during the song "What's the Use of Presents?" in Arthur's Perfect Christmas, the train goes past the Eiffel Tower.
In "D.W.'s Backpack Mishap," D.W. finds a clay model of the Eiffel Tower in the backpack she picked up by mistake.
In "D.W., Bossy Boots," Emily has a birthday cake shaped like the Eiffel Tower. It also appears in a video watched by Emily and her friends at the party.
In the opening of "World Girls," the Eiffel Tower is present in a fantasy of sorts that depicts the World Girls as talking characters.
In "Strangers on a Train", Sue Ellen is telling a story to Betsy Johnson, in which she references the Eiffel Tower: "The taxi driver who spoke perfect English, asked where we wanted to go, and I said, 'take us to the awful tower', oh it was terrible. My mom and dad couldn't stop laughing."
In "Mr. Alwaysright," Mr. Ratburn asks which structure Gustav Eiffel is most famous for. The answer to the question was the Eiffel Tower, which Brain purposely answered wrong.
In "Prunella and the Haunted Locker," Prunella" builds a model of the Eiffel Tower for class.
In "The Case of the Girl with the Long Face," Virgule Watteau must find out who replaced the Eiffel Tower with a giant baguette.