 Complete the following phrase:  In 195556, Porto lifted the Taça de Portugal for the first time, and in doing so secured their first league and cup double. The following season saw the clubs international stage premiere in the European Cup. Thirty years later, Porto beat Bayern Munich in the 1987 European Cup Final to win their maiden European silverware.ref name198687 European Cupref The following season brought the club further successes in the UEFA Super Cup and 