The Codex Las Huelgas (E-BUlh) is a music manuscript or codex from c. 1300 which originated in and has remained in the Cistercian convent of Santa María la Real de Las Huelgas in Burgos, in northern Spain.
Most of the music dates from the late 13th century, with some music from the first half of the 13th century (Notre Dame repertory), and a few later additions from the first quarter of the 14th century. Many of the pieces are not found in any other manuscripts.