There are several colloquia of the TU physics department, where scientists from abroad give a talk on a subject of their research field.
Physikalisches Kolloquium : i.e. the colloquia of the physics department (responsible: prof. A. Knorr, prof. Ch. Thomsen)
Berliner Physikalisches Kolloquium : Colloquia jointly organized by the phsics departments of the universities in Berlin (FU, HU and TU) and Potsdam, and the Berlin Physics Society.