The Virgin Blue by Tracy Chevalier

Ella Turner (Tournier) and her husband, Rick, travel to France for a work assignment of Rick's. Peculiar dreams connect Ella to ancestors from the 1500's. This sets her on a journey of self-discovery which takes the reader to the story of the Tourniers at the time of the Catholic persecution of the Calvinists and Huguenots. Ella meets 'family' in Switzerland, giving her a respite from her problems with her husband.  She is falling in love with a local librarian, at the same time as she has become pregnant.  A variety of characters in the present and the past generate the colour of their lives. Ella must make serious decisions and put to rest the Virgin blue that invades her mind.