As was mandatory in his epoch, he changed his previous Kur coat of arms to the Szreniawa one as he served under starosta Jan Kmita from Wiśnicz - starosta of Red Ruthenia (thus accepting his coat of arms as his).
In year 1399 by King Władysław II Jagiełło decret Klemens Kurowski became owner of Kurów in Puławy powiat.
On 6 January 1442 his son Piotr Kurowski managed to convince King of Poland Władysław III to change law ruling in city from Polish town privileges to Magdeburg rights.
City obtains same coat of arms as his previous one: White Cock.Noteworthy is information about Bochotnica Castle (bought in 1399 from Jan of Bejsc), with at end of 15th century was transferred into hands of Anna Zbąska of Nałęcz.
Oldest document signed by Klemens Kurowski with Szreniawa coat of arms was dated 1396 and was made in first year of functioning as castellan of Żarnów.