Her brother ascended to the throne in 1515, at which point she becomes one of his most trusted advisors and diplomats, allowing her to travel to all areas of Western Europe.
Marguerite de Navarre's brother was Francis I of France, and this is important to note that during his reign he is most remembered for his collection of artwork and building of a magnificent library. This is important because having someone of historical significance during that era who fancied the arts would have helped boost Marguerite's career since females back then rarely got to publish or even have an education. Francis I of France was able to put Paris and France at the forefront, and his love for the arts and literature could have very well fostered his sister's talented career.