On 14th June 2014, anonymous vandalists spraypainted the portal of St. Clement inscription: "Help thy neighbor?"
Source:
http://www.christianophobie.fr/breves/nantes-encore-des-graffitis-sur-la-basilique-saint-nicolas?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+Christianophobie+%28Observatoire+de+la+christianophobie%29