You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Szlachta

Context:
One of the most important victories of the magnates was the late 16th century right to create ordynacja's (similar to majorats), which ensured that a family which gained wealth and power could more easily preserve this. Ordynacje's of families of Radziwiłł, Zamoyski, Potocki or Lubomirski often rivalled the estates of the king and were important power bases for the magnates.

Question:
When did the right to create ordynacja's happen?

late 16th century