The Cube in Cube puzzle is a so-called 'framed packing puzzle' - all of the pieces must fit inside of the frame, forming a cross shape without the frame. The presence of the frame means that some maneuvering is required in order to solve the puzzle.
Made in two woods by Jean-Claude Constantin. Jean-Claude Constantin lives in Germany, where he designs and manufactures many different wood and metal puzzles, as well as magic tricks and other intellectual toys and games.