We never quite thought we'd see this. From Spiegel Online: a naked tax protest by Attac-Germany, with calls for unitary taxation and country by country reporting.
The messages on the big poster are "Reveal balance sheets" and "Unitary tax now" and "FKK for corporations"(in German, "FKK" refers to "Freikörperkultur," - a reference to naturists, or people who like to be naked. They want corporations to reveal themselves too.)
Read more about unitary tax here, and about country by country reporting here.
Hat tip: Markus Henn.