Constantinos Angelidis was born in Tripoli (Greece) in 1964.
He studied Theology at the Athens Higher Theological School and in the Faculty of Theology of the University of Athens. He also studied Byzantine Music with Constantinos Tasopoulos and Lykourgos Angelopoulos. He teaches the subject of Religious Instruction in secondary education.
With a scholarship from the Alexandros Onassis Foundation he took part as a researcher in the programme of research into and analysis of the works of the Byzantine Maïstor Ioannes Koukouzeles.
Since 1981, he has served the art of chant: as lampadarios at the Church of the Nativity of the Theotokos, Tripoli, at Our Lady Palatiane, Petroupolis, at St Irene (Aiolou St) in Athens, and as Protopsaltes at St Philothei and at St Eustathius, Perissos, and at Our Lady Pantovasilissa, Rafina. Since 2014, he has been Protopsaltes at Aghii Anarghyri, the historic dependency (metochi) of the Holy Sepulchre in Athens (Plaka district).
Constantinos Angelidis has taught music in schools, educational institutions, conservatoires, and monasteries.
Since 1996, he has taught at the School of Byzantine Music of the Archbishopric of Athens (Church of the Fount of Life, Akadimias St), while in 2013 he became Director of the School’s Byzantine Choir.
In 2012 he has taught also in Cyprus (Limassol and Nicosia), where he set up the Cyprus Byzantine Choir.
Since 1983, as a member of the Hellenic Byzantine Choir, directed by Lykourgos Angelopoulos, he has taken part in more than 900 events in Greece and in 30 countries in Europe, Asia, America, and Africa. In addition, he has with the Choir taken part in the presentation of works of ancient Greek music, ancient Roman chant and modern music at the ancient theatres of Epidaurus and Delphi, the Odeion of Herod Atticus, etc., with radio and television recordings in Greece and abroad, and in the publication of CDs and cassettes in Greece and France.
As a soloist, he gave two concerts, in Yaroslav and Warsaw, in Poland, with interpretations of twelfth-century compositions.
He worked as a music producer with Hellenic Radio from 1985 to 2005, while since 2009 he has worked with the radio station of the Church of Greece in the field of Byzantine music.
In 1994, he undertook the organisation and teaching of the Choir of the Fathers of the Vatopaidi Monastery on the Holy Mountain of Athos, which he directed on the 14 CDs which have been published with chants by classic Byzantine and Vatopaidi composers. He also directed a choir of cantors for the publication of a double CD in collaboration with the Chilandari Monastery on Mount Athos.
In late 2005, Constantinos Angelidis set up the Centre for Studies of the Αrt of Chant and the TROPOS Byzantine Choir, which he has directed in many liturgical events and concerts in Greece and abroad (Poland, Romania, Cyprus, Turkey, Israel, Egypt, Serbia, Morocco, Germany, Sweden, France, Great Britain, Portugal, Austria, Lebanon, the Czech Republic, and Russia), as well as in the publication of CDs with classic as well as hitherto unpublished works by Byzantine and more modern Athonite and Constantinopolitan composers.