This paper deals with morphological and part-of-speech tagging applied to manuscripts written in Middle High German. I present the results of a set of experiments that involve different levels of token normalization and dialect-specific subcorpora. As expected, tagging with “normalized”, quasi-standardized tokens performs best. Normalization improves accuracies by 3.56–7.10 percentage points, resulting in accuracies of> 79 % for morphological tagging, and> 91 % for part-of-speech tagging. Comparing Middle with New High German data of similar size, the evaluation shows that part-of-speech tagging, but not morphological tagging, is clearly easier with modern data.