Marian devotion nearly died out after Vatican II due to misinterpretation of the Council, some willful. First Paul VI, with Marialis Cultus (1974) and then most significantly John Paul II who reversed that.
Episode 16 - Dr Carrie Gress: Femininity and Feminism, Mary and Anti-Mary
Episode 10 – Rachel Fulton Brown on How A True, Medieval-Style Devotion to Mary Will Save the Faith and the Culture
The traditional interpretation of scripture and reading of the cosmos - the Book of Nature - sees Mary in almost every detail, who then, in turn, shows us her Son. Until we rediscover that art of seeing the interrelatedness of all things around us, and that so much that is good is in some way a sign that points to God, through Mary, we cannot create a culture that reflects cosmic, and hence Divine beauty.