Leichte Sprache", the German counterpart to Simple English, is a regulated language aiming to facilitate complex written language that would otherwise stay inaccessible to different groups of people.We present a new sentencealigned monolingual corpus for Simple German -German.It contains multiple documentaligned sources which we have aligned using automatic sentence-alignment methods.We evaluate our alignments based on a manually labelled subset of aligned documents.The quality of our sentence alignments, as measured by the F1-score, surpasses previous work.