Born on January 27, 1915 in Pylypcze, Borshchiv, Ternopil Oblast in Ukraine to Jakiw Gniazdowski (h. Korab) and Martha Kubej (a Crimean/Kuban orphan). Jacques is the youngest of seven children and the son of his parents' old age.
Jacques starts drawing as a young child, his most prized possession is his double-ended two color pencil.
Attends private school (gymnasium) in Chortkiv. During his years in Chortkiv, Hnizdovsky had a roommate that was heavily involved in politics, something Hnizdovsky had no interest in whatsoever. During a school search by the Polish police, Hnizdovsky's roommate, fearing impending arrest, decided to frame Hnizdovsky by hiding all his political flyers under the the young artist's mattress. Hnizdovsky was arrested and imprisoned, while his roommate went free. The imprisonment, which we originally thought lasted for days, may have in fact lasted over a year. When Hnizdovsky was imprisoned, the length of his trousers were at his ankles, by the time he was released, they were at his knees. Hnizdovsky was cleared of all charges, but the Chortkiv Academy refused to allow him to return.
The young artist was saved by Metropolitan Andrey Sheptytsky OBM, who allowed the young artist to attend Seminary, so that he could complete his gymnasium studies.
Graduates from Seminary in Lviv.
Enrolls in the Academy of Fine Arts in Warsaw with the help of Metropolitan Andrey Sheptytsky OBM, who provides the young artist a scholarship so that he could study fine arts in Warsaw.
Germany invades Poland, and Hnizdovsky is forced to flee Warsaw by foot and by stowaway, with nothing but the clothes on his back. He continues his art studies at the Academy of Fine Arts at the University of Zagreb, receiving credit for the two semesters he completed at the Academy of Fine Arts in Warsaw.
Graduates from the Academy of Fine Arts in Zagreb with honors. Continues post-graduate studies at the Academy of Fine Arts, Zagreb for two more years.
Continues painting and drawing while living in a Displaced Persons' Camp in Wayern, Germany. Awaits permission to emigrate to the Unites States.
Arrives in the United States and settles in Saint Paul (Minnesota), working as a commercial artist and textile designer for Brown & Bigelow.
Receives the Purchase Award at the 1950 Minneapolis Institute of Arts Print Exhibition.
Moves to New York City to establish himself as an independent fine artist.
Receives American Citizenship on November 11, 1954
Travels to Paris to paint the architecture of Paris.
Marries a grand-daughter of the Levytsky ecclesiastical and political dynasty of Lviv and Sambir), a recent graduate of ESMOD (École Supérieure des Arts et Techniques de la Mode), who was working in Paris as a stylist. Her support allows Hnizdovsky to stay an extra year in Paris to paint.
Arrives back to New York City with his new bride, settling in an unheated apartment in the East Bronx, a far cry from the apartment they shared in Paris.
Awarded the First Prize at the Boston Printmakers Annual Exhibition for his woodcut print "The Sheep".
Died of a massive cerebral hemorrhage on November 8, 1985. Interred at the Cathedral of St. John the Divine in New York City. Twenty years after his death, his remains are transferred to the historic Lychakiv Cemetery in Lviv, Ukraine.