Dear Colleagues, We are pleased to inform you that a Summer School on some selected topics in category theory and in algebraic topology will take place at the Universite catholique de Louvain from Thursday 12 to Saturday 14 September 2013. There will be three mini-courses, given by the following lecturers: Kathryn Hess (EPFL), Pascal Lambrechts (UCL), and Gavin Seal (EPFL). The website of the school can be found at the address www.uclouvain.be/math-ctat This Summer School is jointly organized by the research groups in category theory and in algebraic topology at the Universite catholique de Louvain and at the Ecole Polytechnique Federale de Lausanne. A second Summer School will take place at the EPFL in 2014, and will be announced later on. If you are interested in attending the Summer School, please contact any of the organisers. Best regards, Kathryn Hess and Marino Gran [For admin and other information see: http://www.mta.ca/~cat-dist/ ]