The pop-up box, when expanded and translated, means this:
All political, economic and financial decisions in Belgium are taken here. For a decision to be taken, the Belgian Parliament (Wetstraat) has to seek prior approval from the Learned Elders of Zion cell based at the Great Synagogue of Brussels (Regentschapsstraat).
It's been there for nearly a year.
I complained to Google, we'll see if anything gets done.
(h/t Philosemitism blog)