Kosta Boda Fortress CubeAs a sculptor, Bertil Vallien has transformed Michelangelo's marble block into a transparent glass cube. They have the same eye as artists: a hidden secret is sealed inside the glass and marble, which they have made their mission to find and reveal. Over the years, Bertil's cubes have come to represent one of his most captivating worlds. Large and small, an abode for a head or a body, and sometimes simply as is the case here a foundation for a house,