An example of this is the charcoal drawing The Massacre of the Saxons beneath Hrubá Skála. It demonstrates how precise Aleš was in his portrayal of historical details. It depicts a historical scene described in the Dvůr Králové Manuscript concerning the battle between Margrave Siegfried of Meissen and the Czech feudal lord Beneš, which took place during the reign of Přemysl Otakar I at the beginning of the 13th century. A picture based on the drawing and with the same title was painted the following year for the Czechoslavic Ethnographic Exhibition in Prague by Aleš in collaboration with three other artists. Its dimensions are a respectable 10 × 8.5 m. The canvas is now housed in the Museum of the Bohemian Paradise in Turnov.