Keywords: Boesendorfer Wieden 8.png Ludwig Bösendorfer 1835-1919 Factory of piano manufacturer Bösendorfer in Vienna's IV district Wieden Boesendorfer_Wieden_8 jpg 2011-02-01 10 28 UTC Boesendorfer_Wieden_8 jpg anonymous derivative work PawełMM <span class signature-talk >talk</span> jpg topng borders removed PawełMM Boesendorfer_Wieden_8 jpg Bösendorfer factory Wieden Ludwig Bösendorfer |