The East Side Gallery (German: East-Side-Gallery) memorial in Berlin-Friedrichshain is a permanent open-air gallery on the longest surviving section of the Berlin Wall in Mühlenstraße between the Berlin Ostbahnhof and the Oberbaumbrücke along the Spree. It consists of a series of murals painted directly on a 1,316 m (4,318 ft) long remnant of the Berlin Wall, located near the centre of Berlin, on Mühlenstraße in Friedrichshain-Kreuzberg.

In the spring of 1990, after the opening of the Berlin Wall, this section was painted by 118 artists from 21 countries. The artists commented on the political changes of 1989/90 in a good hundred paintings on the side of the Wall that was formerly facing East Berlin. Due to urban development measures, it is no longer completely preserved, and instead of the originals from then, only the replicas from 2009 exist today.

The actual border at this point was the Kreuzberg bank of the Spree. The gallery is, for the most part, located on the western wall, which closed off the border area to East Berlin. This wall, facing inwards towards West Berlin, was much thicker and more fortified than its outward-facing counterpart. However, a small portion of the so-called "hinterland" wall has managed to survive, despite it's weaker structure, as part of the memorial. Mühlenstrasse, one of the main arterial roads to the south, ran along these border installations. Due to the spatial conditions, the previously usual concrete pipes were already installed here, so that the interior wall in this area was atypically optically, but somewhat elevated, resembling the outer wall.

The gallery has official status as a Denkmal, or heritage-protected landmark. According to the Künstlerinitiative East Side Gallery e.V., an association of the artists involved in the project, "The East Side Gallery is understood as a monument to the fall of the Berlin Wall and the peaceful negotiation of borders and conventions between societies and people", and has more than three million visitors per year.