The painting is at National Gallery of Art, Washington D.C. . masonite was the medium for this . Judith Beheading Holofernes was painted by John Trumbull . The painting Judith Beheading Holofernes is 176.0 cm by 97.0 cm and 195.0 inch by 3.7 inch . This was made in 1598
The area is 17072.0 sq.cm