Dear Colleagues, This is the second announcement concerning the Summer School on some selected topics in category theory and in algebraic topology which will take place at the UCL in Louvain-la-Neuve from Thursday 12 to Saturday 14 September 2013. There will be three mini-courses of 6 hours, given by the following lecturers: Kathryn Hess (EPFL), Pascal Lambrechts (UCL), and Gavin Seal (EPFL) (see the webpage of the conference at the address www.uclouvain.be/math-ctat for more details). A list of the participants who have already registered is available on the webpage of the conference. There is no conference fee to attend the Summer School; however, registration is required. In order to register please just send an email with your affiliation to marino.gran@uclouvain.be by June 15, 2013. At the end of June some documents concerning the prerequisites for the mini-courses will be made available to the registered participants. We are looking forward to seeing you in Louvain, best regards, Kathryn Hess and Marino Gran [For admin and other information see: http://www.mta.ca/~cat-dist/ ]