The longest German Arthurian romance in verse form (dating from approx. 1230) is edited here for the first time in accordance with the Master Manuscript method up to the point where the body of coherent ongoing text in the manuscript providing the truest reflection of the original (Cod. Vind. 2779) breaks off, i.e. as far as Verse 12281. As such it replaces at least in part the old, inadequate and out-of-print edition from the year 1852. Passages from the other manuscripts are printed parallel to the master text. A text-critical commentary below the text records former suggestions for the reconstruction of the text alongside reasoned justifications for the proposals advanced by the present editors.