Concert program One of the oldest churches in Prague established as a Romanesque Basilica in the 12th century belongs to the Sovereign Military Hospitaller Order of St. John of Jerusalem of Rhodes and of Malta Visiting a concert held in this church also provides the unique opportunity to view the interior of a church, which is otherwise not open to the public. Concerts are performed on the newly renovated organ (in 2006). The church is heated.   June 2007 Tuesday 5.6. 18:00 Organ Gala below the Chain J. S. Bach, F. Liszt, J. Brahms J.Pokorná – Organ Tuesday 12.6. 18:00 Organ Gala below the Chain J. Haydn, A. Dvořák, L. Lefébure-Wely J.Janšta – Organ Tuesday 19.6. 18:00 Organ Gala below the Chain J. S. Bach, M. Reger, F. Mendelssohn-Bartholdy J.Kalfus – Organ Tuesday 26.6. 18:00 Organ Gala below the Chain J. S. Bach, A. Vivaldi, W. A. Mozart M.Hejsková - Organ