Zygmunt Grudziński (1568 or 1572 – 1653) was a Polish noble (szlachcic) of Grzymała coat of arms.
He was known to be a shrewd investor, something not common among the szlachta, who tended to look down upon merchants and people dealing with non-agricultural trade.
A member of Czech Brethren, he converted to Roman Catholicism near the end of his life, and in order to attract settlers to his lands he was a strong believer in religious tolerance.
Early industries of the city, supported by Zygmunt, included a brewery, cloth manufacture, gunsmiths (bractwo kurkowe) and shoemakers guilds, the latter received its own statue in 1644.
By that time the town has already become one of the most important cloth producers in Wielkopolska region of the Commonwealth.