In NUMBER@1 PERSON@1 entered the service of PERSON@2 , the son of Pope PERSON@3 , acting as a military architect and engineer and travelling throughout LOCATION@1 with his patron .

The Battle of Anghiari In NUMBER@1 and NUMBER@2 , PERSON@1 worked for a powerful noble called PERSON@2 , who was the son of Pope PERSON@3 . He travelled around LOCATION@1 with PERSON@4 , as a military architect and engineer .
