الإدريسي
In medieval Latin documents, Łęczyca is called Lonsin, Lucic, Lunciz, Lantsiza, Loncizia, Lonsitia and Lunchicia. In the early 12th century, Gallus Anonymus called Łęczyca “Lucic”, and in 1154, Arab geographer Muhammad al-Idrisi named it Nugrada, placing it among other main towns of the Kingdom of Poland, such as Kraków, Sieradz, Gniezno, Wrocław and Santok.