Dear all, The 103rd Peripatetic Seminar on Sheaves and Logic will be held on the weekend of the 7th-8th April 2018 at Masaryk University in Brno, Czech Republic. On the afternoon of Friday 6th there will be pre-PSSL talks by Moritz Groth and Simon Henry on the theme of higher category theory. A web page with some information, including travel directions, accommodation, and instructions for registration and submission of talks, is available at: https://www.math.muni.cz/~loregianf/PSSL103/PSSL103.php A limited amount of financial support is available for foreign Phd students and young researchers. If you would like to apply for financial support it would be best to contact us as soon as possible. We would be delighted to see you in Brno, the organizers John Bourke, Ivan Di Liberti, Simon Henry, Michael Lieberman, Fosco Loregian, Masaryk University. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]