Do you have a written appraisal from a qualified appraiser for that?

Yes. From a certified appraiser.

<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f8283.pdf">https://www.irs.gov/pub/irs-pdf/f8283.pdf</a>

Also be aware of the "unrelated use" rule.

If you donate an item of personal property that will be used for a related use (like, donating a painting to an art museum for their collection) you can claim the fair market value.

But if you are donating an item that will be used for an unrelated use (like, donating a painting that will be sold at auction to raise funds) then you can only deduct THE LOWER OF the fair market value or your cost basis.  Your cost basis is what you paid, or the price paid by the person who gave it to you, or the value on the date you inherited it.  

So if you have a painting that cost your grandfather $500, and it was given to your mother who gave it to you, and it is now worth $45,000, and you donate it to the university's art collection, your charitable deduction value is $45,000.  

But if you donate it to a university auction to raise funds, your donation value is $500.  (In that case you would be better off selling it, reporting the profit as a long term capital gain and pay the tax, then make a cash donation.)  And if you inherited the painting from your mother 15 years ago when the value when $30,000, then that is your tax deduction value.

Incidentally, you report the entire value of the donation and let Turbotax handle the limitation and the carry forward automatically.