I KNEW IT! in other words i gotta hit the library for some Renaissance art books like i used to do back in the day. let's be honest, the internet is not the end-all, be-all of information or sources. muthafuckas have been drinking the Kool-Aid so fuckin' long they're believing the hype. i'm sure that's what you did though, went to a library or book store for references.
i know right? books of that magnitude are usually OLD and HUGE. if they do have some they're copyright-free and sold in bookstores like Barnes & Noble.