(Apologies in case of receipt of multiple copies) Dear Colleagues, George Janelidze will celebrate his 60th birthday in May of 2012. In order to honour his contributions to Mathematics, and in particular to Category Theory, a Workshop on Category Theory will be held at the University of Coimbra, July 9-13, 2012. For up-to-date information, please consult www.mat.uc.pt/~workct We would be very glad to welcome you at the workshop, as a participant and/or contributor to the scientific program. Pre-registration: In case you are planning to come please send us an email (workct@mat.uc.pt). Submission of Abstracts: Contributed talks in all aspects of Category Theory are welcome. If you intend to give a 30mn talk, please send us your abstract before May 31, 2012. The workshop will be hosted by the Centre for Mathematics of the University of Coimbra. The Organizers Maria Manuel Clementino Marino Gran Jorge Picado Manuela Sobral Lurdes Sousa [For admin and other information see: http://www.mta.ca/~cat-dist/ ]