Although the acts of the English Parliament after Magna Carta until the beginning of the Puritan Revolution are not so widly known, they played an important role in the development of parliamentarianism not only in England, but in all over the world parliamentary practice. It is evident how each successive Parliament with methodical persistence succeeded to gain new rights in the centuries-old struggle with royal power.
Gradually, its composition expan-ded to include representatives not only of the clergy and nobility, but also the small knights and the cities. Composed of two Chambers, Parliament acquires a decisive role in determining the taxes and rule on the legality of the election. That is time when some of the most important principles of modern parliamentarianism are introdused: parliamentary immunity, freedom of the statements of representatives and their right of legislative initiative. Without these principles, the modern parliamentary government would not be possible.