![File:Barbo, Marco – Instrumentum monitorium contra Johannes Vridach, Johannes von Sommeren, Komtur von Reval et sociis, 1490 – BEIC 11772219.jpg - Wikimedia Commons File:Barbo, Marco – Instrumentum monitorium contra Johannes Vridach, Johannes von Sommeren, Komtur von Reval et sociis, 1490 – BEIC 11772219.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/8/88/Barbo%2C_Marco_%E2%80%93_Instrumentum_monitorium_contra_Johannes_Vridach%2C_Johannes_von_Sommeren%2C_Komtur_von_Reval_et_sociis%2C_1490_%E2%80%93_BEIC_11772219.jpg/324px-Barbo%2C_Marco_%E2%80%93_Instrumentum_monitorium_contra_Johannes_Vridach%2C_Johannes_von_Sommeren%2C_Komtur_von_Reval_et_sociis%2C_1490_%E2%80%93_BEIC_11772219.jpg)
File:Barbo, Marco – Instrumentum monitorium contra Johannes Vridach, Johannes von Sommeren, Komtur von Reval et sociis, 1490 – BEIC 11772219.jpg - Wikimedia Commons
![Pietro Barbo, 1417-1471 (Pope Paul II, 1464), as Cardinal of San Marco [obverse], 1455, Stock Photo, Picture And Rights Managed Image. Pic. HEZ-2813203 | agefotostock Pietro Barbo, 1417-1471 (Pope Paul II, 1464), as Cardinal of San Marco [obverse], 1455, Stock Photo, Picture And Rights Managed Image. Pic. HEZ-2813203 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/f1b3b56194052b2652996c3c77514821/hez-2813203.jpg)
Pietro Barbo, 1417-1471 (Pope Paul II, 1464), as Cardinal of San Marco [obverse], 1455, Stock Photo, Picture And Rights Managed Image. Pic. HEZ-2813203 | agefotostock
Cardinal Marco Barbo as Protector of English Interests at the Roman Curia in the Late Fifteenth Century - Stella Fletcher, 2000
![File:Barbo, Marco – Instrumentum monitorium contra Johannes Vridach, Johannes von Sommeren, Komtur von Reval et sociis, 1490 – BEIC 11772219.jpg - Wikimedia Commons File:Barbo, Marco – Instrumentum monitorium contra Johannes Vridach, Johannes von Sommeren, Komtur von Reval et sociis, 1490 – BEIC 11772219.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/8/88/Barbo%2C_Marco_%E2%80%93_Instrumentum_monitorium_contra_Johannes_Vridach%2C_Johannes_von_Sommeren%2C_Komtur_von_Reval_et_sociis%2C_1490_%E2%80%93_BEIC_11772219.jpg/518px-Barbo%2C_Marco_%E2%80%93_Instrumentum_monitorium_contra_Johannes_Vridach%2C_Johannes_von_Sommeren%2C_Komtur_von_Reval_et_sociis%2C_1490_%E2%80%93_BEIC_11772219.jpg)
File:Barbo, Marco – Instrumentum monitorium contra Johannes Vridach, Johannes von Sommeren, Komtur von Reval et sociis, 1490 – BEIC 11772219.jpg - Wikimedia Commons
![Il carteggio fra il Card. Marco Barbo e Giovanni Lorenzi " 1481 - 1490 ".: Ottimo (Fine) brossura (1948) | ELIOSLIBRI Studio Bibliografico Il carteggio fra il Card. Marco Barbo e Giovanni Lorenzi " 1481 - 1490 ".: Ottimo (Fine) brossura (1948) | ELIOSLIBRI Studio Bibliografico](https://pictures.abebooks.com/inventory/31392054855.jpg)