Calvin's power was very great in his last years. He was known all around the world as a reformer different from Martin Luther. Mainly, Luther and Calvin respected each other. However, Luther and a Zürich reformer Huldrych Zwingli thought differently about the eucharist. Calvin's thoughts about it made Luther believe that Calvin agreed with Zwingli. At the same time, Calvin was sad that the reformers were not all together. He tried to join them together by signing the "Consensus Tigurinus". This was an agreement between the Zürich and Geneva churches.