卢森堡语
The Codex Mariendalenis is a manuscript on vellum containing the epic poem Yolanda vu Veianen or Yolanda of Vianden. It is believed to be the work of Brother Hermann von Veldenz who probably wrote the story of Yolanda's life in 1290 after her death in 1283. The work consists of 5,963 lines of rhyming couplets in Moselle Franconian which bears close similarities to today's Luxembourgish. It is therefore of particular interest to those tracing the history of the Luxembourgish language.