Marie Pierik

• Amor a Arte de Viver. Uma Visão Quântica Psicológica e Espiritual
• Dramatic and symbolic elements in Gregorian chant
• Gregorian Chant
• Gregorian chant analyzed and studied
• The Psalter in the temple and the church
• The song of the Church
• The Spirit of Gregorian Chant
• The spirit of The Gregorian chant