The text recalls the prehistory of Lviv's fortifications, built back in the time of Casimir the Great, who significantly expanded the nascent city and also founded a fortified brick castle, known as the "high castle". Nowadays, all that is left of the high castle are the remains "huddled around the foot of the mound" (Source: "Ziemia. Tygodnik Krajoznawczy Ilustrowany', Warsaw 1911, no. 14, pp. 5-6, after: Wielkopolska Biblioteka Cyfrowa).