At the Kaiserleikreisel in Offenbach, at the interface between Offenbach and Frankfurt, the Siemens/AEG Kraftwerksunion (KWU) building complex has been vacant since 2004 and has changed hands several times in the meantime.Back in 2015, a Berlin real estate developer, the CG Group AG, wanted to convert the former KWU towers, which had been vacant for