© Andrew Bossi - Own work CC BY-SA 2.5

Opera had been performed in Graz since the 17th century, originally in a converted coach house on the Habsburg royal estates. The National Theatre (Schauspielhaus Graz), constructed in 1776, saw many early performances of Mozart's operas, although today (after many reconstructions) it is devoted to the performances of plays. (Wikipedia)

Wikipedia Graz_Opera
Capacity 1400
Address Kaiser-Josef-Platz 10, 8010 Graz , Graz, Austria
Architect Ferdinand Fellner and Herman Helmer
Opening year 1899, September 16th
Official website https://oper-graz.buehnen-graz.com/