Hola
If you are looking for who was haydn's principal patron ? Then, this is the place where you can find some sources that provide detailed information.
who was haydn's principal patron
Shop Haydn The Symphonies | Amazon.com Official Site
Ad Find Deals on haydn the symphonies in Classical Music on Amazon.
I hope the above sources help you with the information related to who was haydn's principal patron . If not, reach through the comment section.