Two guitar ensembles join hands during this surprising concert. One of the most versatile and beloved instruments - the guitar - undergoes a worldwide metamorphosis from a mainly solo instrument to a connecting medium between many musical styles and cultures. While there are no professional major guitar ensembles yet, the lead is taken by a number of high-level ensembles, occupied by young professionals. Two of the best of them share a concert in the special acoustics of the Oosterkerk, with a lot of varied music and unexpected sounds. Admission free, but donations are welcome.