 Complete the following phrase:  Strasbourg played an important part in Protestant Reformation, with personalities such as John Calvin, Martin Bucer, Wolfgang Capito, Matthew and Katharina Zell, but also in other aspects of Christianity such as German mysticism, with Johannes Tauler, Pietism, with Philipp Spener, and Reverence for Life, with Albert Schweitzer. Delegates from the city took part in the Protestation at Speyer. It was also one of the first centres of the printing industry with pioneers such as Johannes Gutenberg, Johannes Mentelin, and Heinrich Eggestein. Among the darkest periods in the citys long history were the years 1349 Strasbourg massacre, 1518 Dancing plague, 1793 Reign of Terror, 1870 