In Assassin's Creed Unity, which Paris landmark contains Arno's initial Assassin headquarters?

In Assassin's Creed Unity, Arno's initial Assassin headquarters is the Café Théâtre. After joining the Brotherhood, Arno uses the Paris theater as a base for planning missions, meeting allies, and managing improvements to the property.

The Café Théâtre is located in the Île Saint-Louis area of the game's recreation of revolutionary Paris. It is more than a decorative landmark: players can renovate it, unlock upgrades, and receive income through associated activities. This makes the building a persistent hub during the campaign.

The setting is often confused with famous Paris landmarks that appear elsewhere in Unity. Notre-Dame Cathedral, the Louvre, and the Bastille are all important locations in the game, but they are not Arno's headquarters. Arno Dorian joins the French Assassin Brotherhood after the murder of his adoptive father, beginning the personal investigation that drives the story.