Rundfunk Berlin-Brandenburg

(; "Berlin-Brandenburg Broadcasting"), commonly shortened to RBB (; stylized as rbb), is an institution under public law (national broadcaster) for the German states of Berlin and Brandenburg, based in Berlin and Potsdam. RBB was established on 1 May 2003 through the merger of (SFB) and (ORB), based in Potsdam, and is a member of the Association of PSBs in the Federal Republic of Germany (ARD). Aside from its two main studios in Berlin and Potsdam, RBB also has regional studios in Cottbus and Frankfurt (Oder), and regional offices in Perleberg and Prenzlau. RBB also operates ARD's studio in Warsaw; the responsibility changes every five years between RBB and WDR. RBB also plays out ARD's digital channels from a center in Potsdam. RBB and WDR are jointly responsible for ARD's television studio in Berlin. History RBB was founded on 25 June 2002 on the basis of a treaty between Berlin and Brandenburg. As a result, RBB is required to treat both states equally "with respect to the regional content needs".