Another original trompe-l'œil is the "Cabinet of curiosities with an ivory tankard" (1670, Statens Museum for Kunst). This painting was in reality a cabinet door which was probably created to fit into a panel or wall in the Green Cabinet at Rosenborg Castle. The Green Cabinet held Frederik III's rich collection of art objects. The painting looks like a glass door with a metal rack in front of the glass. All kinds of objects are pinned behind the rack such as letters, newspaper advertisements, a quill pen and a pocket knife. Behind the painted glass an ivory tankard, a statue and other treasures are visible. The door has real hinges and a key hole with a key and could in fact be opened. Once opened, the objects depicted in the painting would become visible in real life. The ivory vase and possibly the statuette as well were created by German artist and ivory sculptor Joachim Henne who was also a court artist.