Passage: Schönefeld Airport was the major civil airport of East Germany (GDR) and the only airport of the former East Berlin. Part of Schönefeld's existing infrastructure is set to be incorporated into the neighbouring Berlin Brandenburg Airport, scheduled to open in late 2020. Schönefeld's then refurbished terminals are intended to be used until at least 2026 as part of the new airport.

Question: What type of airport was the Schönefeld Airport?
civil airport