Tramp art is a style of woodworking which emerged in America in the latter half of the 19th century. Some of tramp art's defining characteristics include chip or notch carving, the reclamation of cheap or available wood such as that from cigar boxes and shipping crates, the use of simple tools such as penknives, and the layering of materials into geometric shapes through glue or nails. One technique used in tramp art is Crown of Thorns joinery.