Johann Nepomuk Steiner (1725-1793)

Get a Steiner Certificate of Authenticity for your painting (COA) for your Steiner drawing.

For all your Steiner artworks you need a Certificate of Authenticity (COA) in order to sell, to insure or to donate for a tax deduction.

Getting a Steiner Certificate of Authenticity (COA) is easy. Just send us photos and dimensions and tell us what you know about the origin or history of your Steiner painting or drawing.

If you want to sell your Steiner painting or drawing use our selling services. We offer Steiner selling help, selling advice, private treaty sales and full brokerage.

We have been authenticating Steiner and issuing certificates of authenticity since 2002. We are recognized Steiner experts and Steiner certified appraisers. We issue COAs and appraisals for all Steiner artworks.

Our Steiner paintings and drawings authentications are accepted and respected worldwide.

Each COA is backed by in-depth research and analysis authentication reports.

The Steiner certificates of authenticity we issue are based on solid, reliable and fully referenced art investigations, authentication research, analytical work and forensic studies.

We are available to examine your Steiner painting or drawing anywhere in the world.

You will generally receive your certificates of authenticity and authentication report within two weeks. Some complicated cases with difficult to research Steiner paintings or drawings take longer.

Our clients include Steiner collectors, investors, tax authorities, insurance adjusters, appraisers, valuers, auctioneers, Federal agencies and many law firms.

We perform Johann Nepomuk Steiner art authentication, appraisal, certificates of authenticity (COA), analysis, research, scientific tests, full art authentications. We will help you sell your Johann Nepomuk Steiner or we will sell it for you.



Johann Nepomuk Steiner was an 18th century painter. He mainly painted portraits and religious compositions. Still wondering about an 18th century painting in your family collection? Contact us…it could be by Johann Nepomuk Steiner.