Lieven Baert began his career in 1981 in Ghent, Belgium, and has studied with Elizabeth Aldrich, Ingrid Brainard, Angene Feves, Andrea Francalanci, Francine Lancelot, Prof. Taubert, Barbara Sparti, Jane Gingell, Francine Lancelot, Béatrice Massin and Marie Geneviève Massé. In 1985 he founded Chierlycke Danseryen, a company specializing in 16th century court dances. In 1987 he specialized in 15th century French/Burgundian court dance and gained success with his program "The art of dancing in the 15th century" which toured early music festivals in Utrecht, Glasgow, Krakau, Darmstadt and Berlin. The same year he collaborated with the Belgian ballet world in creating a new historical dance company Danza Antiqua. His Institute of Historical Dance was founded in 1992 to create a field for research and performance practice of historical dance. In 2000 he organized the first International Colloquium on Early Dance in collaboration with the University of Ghent and under the auspices of the Unesco. He was guest professor at the University of Stockholm and teaches every year at the Alicia Alonso Institute University Carlos III in Madrid. He choreographed for the Classical National Theatre in Madrid and worked for the Spanish Cultural Government. Since 2000 he has been stage director for the Brussels Operetta Theatre.
Lieven Baert gründete 1992 das „Institut für historischen Tanz, Musik und Theater“ in Gent, mit dem Ziel, historische Tanzformen aus dem 15. – 19. Jahrhundert wissenschaftlich zu erforschen und zu katalogisieren.
Er unterrichtet in ganz Europa und war Choreograph für die Landshuter Hochzeit 2001 und 2005.