Albert Schwarz started as a topologist/geometer in the early '50s, then in the '70s he began an exploration of mathematical aspects of quantum field theory and made numerous seminal contributions to this subject. He has been a regular visitor to IHES since 1995 and was involved in many significant collaborations. This May he will give a short course on his recent research. The mini-conference is a tribute to the 70th anniversary of Schwarz's remarkable scientific career by several of his friends and colleagues.