One piece shoes after finds from Elisenhof, Eiderstedt in Northern Germany. They are cut so that the seams come off the ground. 9th/10th century AD. There are similar finds from the same and
other places that feature a separately cut sole as well.
Volken, Marquita. Archaeological Footwear, Development of shoe patterns and styles from Prehistory till the 1600's. 2014
Hald, Margrethe. Primitive Shoes. An Archaeological-Ethnographical Study Based Upon Shoe Finds from the Jutland Peninsula. 1972. pp 54.