A few years ago I read a historical fiction book about the Medici family's involvement and influence on Davinci and others in Florence.  It sparked my ongoing interest in the family.  I'm pretty sure it was a long book and that it focused more on Lorenzo, his wife and Da Vinci.  I cannot even slightly remember the name or author??

I've searched off and on the last couple of years on the internet with no luck.  Anyone?

Could it be any of these?

• Lorenzo de' Medici: Florence's great leader and patron of the arts

by Hancock, Lee.

•  Medici money: banking, metaphysics, and art in fifteenth-century Florence

by Parks, Tim.

•  Lorenzo de' Medici and Renaissance Italy by Greenblatt, Miriam

•  Lorenzo de' Medici and the Renaissance by Mee, Charles L.

•  The Medici: a tale of fifteen generations by Cleugh, James.

Anna - The book I'm thinking of is historical fiction.  These books are nonfiction, yes?  I'm pretty sure I've read a couple of these.

edited to add - Thank you!

The Medici Seal??

Painting Mona Lisa?

The Agony and the Ecstasy  This is fiction focusing on one of the great artists.  Was very good, very detailed on the artist's life and struggles.

Just googled, this one is on Michaelangelo, not so much on da Vinci.  It would have talked about the Medicis. 

by Irving Stone.

Also, I tried a general Google on the topics, and ran upon a site that mentioned:

The Spring of the Ram by Dorothy Dunnett     She has a series of historical novels based on Renaissance Italy, main character Niccolo.  One of them might be what you are after, or good reading anyway.

Thanks bunches.  Even if these books aren't the right one I've got something new to look forward to :)