Conversation so far:
What is the background of Tosca?
In the early 1880s Sardou began a collaboration with actress Sarah Bernhardt, whom he provided with a series of historical melodramas.
Did Sarah Bernhardt play a role in Tosca?
His third Bernhardt play, La Tosca, which premiered in Paris on 24 November 1887, and in which she starred throughout Europe.

Question: Where all did they take La Tosca in Europe?
Self-contained rewrite: Where all did Sardou and Bernhardt take La Tosca in Europe?