In August 2017 The HORNCLASS, Interpretation Horn Courses took place in Praha-Břevnov, Czech Republic for the 26th consecutive year and organised as usual by the Prague Horn Trio (Jindřich Petráš, Zdeněk Divoký and Jiří Havlík). This time Raimund Zell from Austria and Ricardo Matosinhos from Portugal were the guest teachers. More than 30 horn players among students, professionals, amateurs and horn enthusiasts coming from Czech Republic, Germany, Italy, Japan, Russia, Slovenia, Slovakia, Switzerland, Netherlands, Portugal and from the USA attended this whole week of amazing horn playing. Some highlights of this courses included a performance of the Czech Wind Harmony, a memorable recital by the guest teachers and Andreas Kreuzhuber at the beautiful Břevnov Monastery, a wonderful recital by János Benyus and chamber music promenades at the St. Agnes Closter. There were two pieces presented as czech premieres, including the Heptafunk, Op.64 for horn ensemble by Ricardo Matosinhos and the Mosaico no.3 by Fernando Morais for horn and piano. It is remarkable that, despite being a country of old horn traditions, the czech horn players are open to the world horn practices and keep on influencing players all over the world.