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

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

Getting a Hennessy 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 Hennessy painting or drawing.

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

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

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

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

The Hennessy 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 Hennessy 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 Hennessy paintings or drawings take longer.

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

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

William John Hennessy was an Irish artist. Hennessy was born in Thomastown, County Kilkenny in 1839. His father, John Hennessy, was forced to leave Ireland in 1848 as a result of his involvement in the Young Ireland movement. He landed in Canada and settled in New York. William, his mother, Catherine, and brother joined their father there in 1849. He gained admittance to the National Academy of Design in 1854 and exhibited his first works there.

Hennessy developed a skill in wood engraving and was hired to illustrate the works of renowned poets, including that of Tennyson, Longfellow and Whittier. As an American he became the co-founder of the Artists’ Fund Society, and an honorary member of the American Society of Painters in Watercolours. In 1870 he moved to London where he became a member of the Royal Institute of Oil Painters in 1902. Between 1879 and 1907 the Royal Hibernian Academy displayed eight of his paintings.

Still wondering about a British painting in your family collection? Contact us…it could be by William John Hennessy.