[1] As a Lorraine native, Michelant was active in research on both sides of the border between France, where he was known as Henri, and Germany, where he published under the first name of Heinrich.
In February 1842, he met, in Tübingen, Ludwig Uhland and Adelbert von Keller, with whom he collaborated as editor of texts in Old French for the collection Bibliothek des Litterarischen Vereins in Stuttgart, in which edited the numbers 13 (1846), 24 (1852), 67 (1862) and 112 (1872).
German Wikipedia, Bibliothek des Litterarischen Vereins in Stuttgart) Michelant obtained his doctorate and taught foreign literature at the University of Rennes from 1849 to 1851.
In 1853, he obtained a managerial position in the Cabinet des manuscrits of the Bibliothèque nationale de France.
[3] Michelant's most significant works were editions of a large number of medieval texts, many published for the first time.