Julián Calleja y Sánchez (December 1, 1836 – April 13, 1913) was a Spanish anatomist, professor, and politician.

[1] In 1856, Calleja secured the role of dissector assistant after passing a competitive examination, integral to the anatomy department.

[2] He delivered a speech at the Faculty of Medicine of the Central University upon receiving his medical degree on July 3, 1859.

[6] Julián Callenga assumed the role of dean at the Old Medicine School of San Carlos in 1877, serving for 25 years.

[9] Julián Calleja y Sánchez took part in Senate sessions on June 13, 14, 15, and 24, 1892, opposing the entire expenditure budget and the Ministry of Development's Public Instruction and Statistical Geographical Institute branches.