Vivaldi portrait gallery, with autograph manuscripts
http://www.karadar.com/PhotoGallery/vivaldi.html

Antonio Vivaldi portrait
http://www.bbc.co.uk/music/profiles/vivaldi.shtml

Vivaldi portrait, with picture gallery
http://w3.rz-berlin.mpg.de/cmp/vivaldi.html

Typical Venetian ospedale in Vivaldi’s time
http://www.baroquemusic.org/bqxvivaldiosp.html

Vivaldi caricature, facsimile scores and Pio Ospedale della Pietà
http://www.aam.co.uk/index.htm?main%3Efeatures/9707.htm

Antonio Vivaldi, Suonata à Violino, Oboè, et Organo obligati
http://www.tu-dresden.de/slub/MiamiExhibit/music.htm

Vivaldi portrait and the Four Seasons
http://www.baroque-music-club.com/vivaldiseasons.html

Title Page of Antonio Vivaldi's L'Estro Armonico of 1711
http://www.hoasm.org/VIIIA/LEstroArmonicoTitlePage.html

Vivaldi Opus 4 (La Stravaganza) Concerto No. 9
http://www.hoasm.org/VIIIA/VivaldiOp4No9.html