If the results of the Diet of 1555 made the Apostolic See vigilant as regards Poland, it is not to be wondered at; for such vigilance was imperative. The Protestants were now more active than ever. The Calvinists of Little Poland energetically developed their work in all the churches occupied by them before the Diet of 1555 and acknowledged by the Diet as theirs in the royal cities, particularly Cracow and Posen, and even in the territories of the royal domain wherever Protestants were found. They founded schools at Pińczów, Secynin, and Koźminek. They were holding frequent synods, and were strengthening and perfecting their internal organization.[153] If the Calvinists of Little Poland were active, so were also the Bohemian Brethren of Great Poland. The number of their followers increased to such an extent that by 1557 a separate senior or superintendent for Great Poland was appointed by the central administrative authority in Moravia.[154] Moreover, to counteract Lippomano’s activity, the Polish Protestants invited to Poland two distinguished reformers, Francis Lismanini and John Łaski. Both of these arrived in the country toward the end of 1556. The first, being a foreigner, the Catholics succeeded in having banished from the country by order of the king, though not until after a good deal of effort.[155] The second, however, being a distinguished native, could not be banished. So he stayed, and worked faithfully, though fruitlessly, for a union of the Lutherans with the other two already united Protestant bodies, the Calvinists of Little Poland and the Bohemian Brethren of Great Poland.[156]