evental site

"I will term evental site an entirely abnormal multiple; that is, a multiple such that none of its elements are presented in the situation. The site, itself, is presented, but 'beneath' it nothing from which is composed is presented. As such the site is not a part of the situation. I will also say of such a multiple that is on the edge of the void, or foundational."

Alain Badiou, Being and Event 1988,
"Evental Sites and Historical Situations", p.173