The byzantine church Hagia Sophia was modelled as part of the CAHRISMA project. Hagia Sophia’s central dome is placed more than 50 metres above the floor, has a diameter of more than 31 m and is embraced by two half domes. The reverberation time is approximately 10 sec (1000 Hz).
The ‘Alleluia’ was sung in Hagia Sophia first Sunday after Easter (‘Antipascha’) according to the Typikon of the Great Church, dating back to around 950, which is the oldest document with precise information on the cathedral liturgy in Hagia Sophia. The music is transcribed from two manuscripts from the Vatican Library (Biblioteca Apostolica Vaticana), namely Vat. gr. 1606 (intro + refrain), and Vat. gr. 345 (verse). The transcription is made by Christian Troelsgård, Assistant Professor at the University of Copenhagen, Faculty of Theology, Dept. for Church History, Denmark.