 
 <prompt> Wetin fit be one requirement for the legal ennoblements? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: According to heraldic sources 1,600 na di total estimated number of all legal ennoblements throughout di history of Kingdom of Poland and Polish-Lithuanian Commonwealth from di 14th century go up (half of which were performed in di final years of di late 18th century). 