Patronage Renaissance art of the North

"I asked if you would marry me?" Raena Arryn proposed a possible union that would benefit both Stark/Arryn's house. However, she is not who she is seemed to be. What if someone was once one of the most powerful women of the 16th century, ruling over the royal French court for 17 years in varying degrees of influence and strength? As she only wished to be a patron of arts again.