WHERE DOES THE 4th Berlin Biennial (BB4), organized with the title “Of Mice and Men” by the team of artist Maurizio Cattelan, curator Massimiliano Gioni, and writer Ali Subotnick, actually begin? The trio’s Gagosian Gallery, Berlin, opened last September, an act of “guerrilla franchising” parodying the high-end dealer’s international expansion; but the project clearly has its roots in the Wrong Gallery, the group’s locked door of a space nestled until last year among Chelsea’s blue-chip galleries (it now resides at Tate Modern). Likewise, the publication Checkpoint Charley appeared in November

How site-specific can you get? Fritz Balthaus tried to find out by constructing the biggest possible sculpture that could fit into the Berlinische Galerie. One might expect the result to be a massive cube with the dimensions of the municipal gallery’s largest exhibition hall. But it turns out that the white cube is not so cubic, at least if one takes into consideration, as Balthaus did, the path from the loading dock, via the service elevator, to the basement depot and then to the exhibition space. I Colli (German shippers’ argot for “package”), 2006, is a mobile, made-to-measure structure of