A conference honored the late Prof. Zdeněk Švestka, one of the great defining personalities of twentieth-century solar physics. His main scientific interest focused on solar flares. During his year at Ondřejov, he became an expert in flare spectra. Later his interests extended into white-light flares, proton flares, and their radio signatures (type II and IV bursts), which were suggestive of shock-acceleration of particles. The conference, organized by the Astronomical Institute, took place on 23-27 June 2014 in Prague. Zdeněk Švestka, born on 30 September 1925 in Prague, passed away on 2 April 2013 in Bunschoten. and Petr Heinzel,Marian Karlický, František Fárník.