Non Sola Scripta is a series of concerts with a unique program formula. The content of the musical evenings – which already resounds in the Latin title – is not only what is written in the score, but also improvisation in various configurations and forms. Non Sola Scripta combines performances of classical organ compositions with improvisation, also performed by virtuosos of instruments other than the organ. The Wroclaw festival is the only organ event in the country, the premise of which is an experiment resulting from the meeting of outstanding musicians: the best organists from around the world with masters of other instruments and outstanding vocalists.
Source and more information: https://strefakultury.pl/festiwale/non-sola-scripta/o-festiwalu/