L'atto penitenziale / The Penitential Act 2a Giornata di studi Ecclesia orans, Roma, Sant'Anselmo, 4 Dicembre 2024 2nd Study Day of Ecclesia orans, Rome, Sant'Anselmo, December 4th, 2024 The editor Markus Tymister is the editor of the journal Ecclesia orans and full professor of Liturgy (History and Liturgy of the Sacraments) at the Facultiy of Liturgy