Due to the special historical and socio-cultural situations in which the Byzantine religious music developed, adopted particularly by the Southeastern nations, it received a new expression and dimension, a specific individuality, original and specific to its adoptive nations. Regarded overall, all these nations are - from the point o f view o f religious music — a similar spiritual community, as the last researches of compared southeastern folklore prove, each o f them contributing with its original and specific share to the crystallization of its own national religious music.