Our friends Emma-Jayne Graham and Jessica Hughes over at Classical Studies run 
a blog on their Votives Project, which explores votive offerings to the Greek and Roman gods and to the present day. Please check out their website which you can find at http://thevotivesproject.wordpress.com/us/ . Incidentally, the cover image for Marion Bowman and Ulo Valk’s new edited volume (pictured) features votive offerings at the Divine Mercy Shrine, Lagiwniki, Cracow, Poland.