The question explored in this article is whether religious schools can contribute to the formation of the civic virtues in pupils by means of citizenship education. It is commonly agreed that civic virtues are needed in pluriform Western societies to promote social cohesion and reduce hostile attitudes. However, some argue that religious schools cannot further this process: in such schools pupils do not learn to deal with people from other religious or cultural backgrounds, which is necessary for the development of civic virtues. In this article we investigate this supposition from a virtue ethical perspective. Using the example of a specific civic virtue (tolerance) and a specific religious educational context (Catholic schools), we argue that religious schools can make a positive and valuable contribution to citizenship education of pupils. We conclude with four implications for religious schools that wish to make such a contribution: (1) creating a moral community, (2) setting a moral example, (3) arranging moral practices, and (4) organising moral conversations. (Contains 11 notes.)