Earlier quoted context omitted.
As an American I refuse to believe there is anything in Brno but a gigantic Česká zbrojovka factory.
The current Česká zbrojovka is located in Uhersky Brod, the Brno location is long gone.
It will essentially become a whole new quarter, with housing, office/retail space and new schools. That's how big it was.
BTW, main focus now in Brno is high tech (a lot of electron microscopy), IT (Red Hat, Kiwi, YSOFT, Seznam, Netsuite, Avast, etc.) and lately also space (OHB, SAB Aerospace, etc.).