After Peter the Great consolidated the autocracy of Russia, and brought his empire into the European state system, the Regents moved the Warehouse to Moscow. For the first time, the Regents began to employ the use of agents who worked for the Warehouse, gathering artifacts and protecting the physical residence. By now, the Warehouse had grown to a very large collection, and more people were required to watch over it, and to travel the world in search of artifacts. Although Napoleon was unsuccessful in his attempt to overthrow Tsar Alexander I in 1812, the incident was enough to shake up the Regents, and after another 18 years, they decided to move the Warehouse once more - fortunately, many decades before the November uprising, and rebellion against the rule of the tsars.
On a rainy day at the Warehouse, Pete accidentally triggers an artifact that transforms the team into two-dimensional diorama versions of themselves, and returns the Warehouse to its original, unstable design.
Who knew Claudia had those moves?! OK, so maybe they're artifact-induced, but we're so in love with the spangles, we don't care!