The Bojnice Altar was executed in tempera on wood panels in the 1350s. The figures represented are as follows: (upper order, l. to r.): St James, St Jerome, the Virgin and Child, St John the Baptist, and St Rainier (lower order, l. to r.): SS Augustin and Mary Magdelene, SS Paul and Catherine, Christ between the Virgin and St John the Apostle, SS Lucy and Peter, and St John Gualbert.

The altar is the work of Nardo di Cione, who is mentioned in 1343 and who died in 1365 or 1366 in Florence. Born into a numerous family of artists, Nardo di Cione was the foremost exponent of Florentine painting following the Black Death epidemic in the latter half of the 14^th century. Together with his brother Andrea he influenced most of the Tuscany painters of his day.

The Bojnice Altar - the only work by Nardo di Cione to survive intact - was one of the most important items in the collections of Count Ján František Pálfy. After an absence of sixty-two years it is once more housed in Bojnice Castle.