Tiergarten, Berlin in the context of "Moabit"

Tiergartenstraße, or Tiergartenstrasse (see ß), is a street in the Tiergarten district in central Berlin, the capital of Germany. The street runs east-west along the southern edge of the Großer Tiergarten park from Kemperplatz and Ben-Gurion-Straße near Sony Center and Potsdamer Platz in the east to the intersection of Hofjägerallee and Klingelhöferstraße in the west. On the street’s southern side, the street intersects with (from east to west), Herbert-von-Karajan-Straße, Stauffenbergstraße, Hildebrandstraße, Hiroshimastraße and Clara-Wieck-Straße.

The neighbourhood was incorporated into the City of Berlin in 1861, soon after the 1871 Unification of Germany it developed into an affluent residential area and later into the capital's diplomatic quarter.

Mitte (German: [ˈmɪtə] ) is the first and most central borough of Berlin. The borough consists of six sub-entities: Mitte proper, Gesundbrunnen, Hansaviertel, Moabit, Tiergarten and Wedding.

It is one of the two boroughs (the other being Friedrichshain-Kreuzberg) which were formerly divided between East Berlin and West Berlin. Mitte encompasses Berlin's historic core and includes some of the most important tourist sites of Berlin like the Reichstag and Berlin Hauptbahnhof, Checkpoint Charlie, Museum Island, the TV tower, Brandenburg Gate, Unter den Linden, Potsdamer Platz, Alexanderplatz and Fotografiska Berlin. The latter seven of which were in former East Berlin.

Aktion T4 (German, pronounced [akˈtsi̯oːn teː fiːɐ]) was a campaign of mass murder by involuntary euthanasia which targeted people with disabilities and the mentally ill in Nazi Germany. The term was first used in post-war trials against doctors who had been involved in the killings. The name T4 is an abbreviation of Tiergartenstraße 4, a street address of the Chancellery department set up in early 1940, in the Berlin borough of Tiergarten, which recruited and paid personnel associated with Aktion T4. Certain German physicians were authorised to select patients "deemed incurably sick, after most critical medical examination" and then administer to them a "mercy death" (Gnadentod). In October 1939, Adolf Hitler signed a "euthanasia note", backdated to 1 September 1939, which authorised his physician Karl Brandt and Reichsleiter Philipp Bouhler to begin the killing.

The killings took place from September 1939 until the end of World War II in Europe in 1945. Between 275,000 and 300,000 people were killed in psychiatric hospitals in Germany, Austria, occupied Poland, and the Protectorate of Bohemia and Moravia (now the Czech Republic). The number of victims was originally recorded as 70,273 but this number has been increased by the discovery of victims listed in the archives of the former East Germany. About half of those killed were taken from church-run asylums. In June 1940, Paul Braune and Fritz von Bodelschwingh, who served as directors of sanatoriums, protested against the killings, being members of the Lutheran Confessing Church.