I want to know the answer to the following question:
Which century did the Old Confederacy of the eight states exist until?
All the background I'm provided with is that "By 1353, the three original cantons had joined with the cantons of Glarus and Zug and the Lucerne, Zürich and Bern city states to form the "Old Confederacy" of eight states that existed until the end of the 15th century.". Is that enough to answer the question?
Answer: yes