of Poland, the Senate (consisting of Ministers, Palatines, Castellans and Roman Catholic Bishops) and the Chamber of Envoys comprising 170 nobles acting on behalf of their holdings as well as representatives of major cities, who did not possess any voting privileges. In 1573, a convocation sejm established an elective monarchy in the Commonwealth. Portugal After its self-proclamation as an independent kingdom in 1139 by Afonso I of Portugal (followed by the recognition by the Kingdom of León in the Treaty of Zamora of 1143), the first historically established Cortes of the Kingdom of Portugal occurred in 1211 in Coimbra by initiative of Afonso II of Portugal. These established the first general laws of the kingdom (Leis Gerais do Reino): protection of the king's property, stipulation of measures for the administration of justice and the rights of his subjects to be protected from abuses by royal officials, and confirming the clerical donations of the previous king Sancho I of Portugal. These Cortes also affirmed the validity of canon law for the Church in Portugal, while introducing the prohibition of the purchase of lands by churches or monasteries (although they can be acquired by donations and legacies). After the conquest of Algarve in 1249, the Kingdom of Portugal completed its Reconquista. In 1254 King Afonso III of Portugal summoned Portuguese Cortes in Leiria, with the inclusion of burghers from old and newly incorporated municipalities. This inclusion establishes the Cortes of Leiria of 1254 as the second sample of modern parliamentarism in the history of Europe (after the Cortes of León in 1188). In these Cortes the monetagio was introduced: a fixed sum was to be paid by the burghers to the Crown as a substitute for the septennium (the traditional revision of the face value of coinage by the Crown every seven years). These Cortes also introduced staple laws on the Douro River, favoring the new royal city of Vila Nova de Gaia at the expense of the old episcopal city of Porto. The Portuguese Cortes met again under King Afonso III of Portugal in 1256, 1261 and 1273, always by royal summon. Medieval Kings of Portugal continued to rely on small assemblies of notables, and only summoned the full Cortes on extraordinary occasions. A Cortes would be called if the king wanted to introduce new taxes, change some fundamental laws, announce significant shifts in foreign policy (e.g. ratify treaties), or settle