established in the Parlement de Paris. These courts came to known as "La Chambre Ardente" ("the fiery chamber") because of their reputation of meting out death penalties on burning gallows. Despite heavy persecution by Henry II, the Reformed Church of France, largely Calvinist in direction, made steady progress across large sections of the nation, in the urban bourgeoisie and parts of the aristocracy, appealing to people alienated by the obduracy and the complacency of the Catholic establishment. French Protestantism, though its appeal increased under persecution, came to acquire a distinctly political character, made all the more obvious by the conversions of nobles during the 1550s. This established the preconditions for a series of destructive and intermittent conflicts, known as the Wars of Religion. The civil wars gained impetus with the sudden death of Henry II in 1559, which began a prolonged period of weakness for the French crown. Atrocity and outrage became the defining characteristics of the time, illustrated at their most intense in the St. Bartholomew's Day massacre of August 1572, when the Catholic party killed between 30,000 and 100,000 Huguenots across France. The wars only concluded when Henry IV, himself a former Huguenot, issued the Edict of Nantes (1598), promising official toleration of the Protestant minority, but under highly restricted conditions. Catholicism remained the official state religion, and the fortunes of French Protestants gradually declined over the next century, culminating in Louis XIV's Edict of Fontainebleau (1685), which revoked the Edict of Nantes and made Catholicism the sole legal religion of France, leading some Huguenots to live as Nicodemites. In response to the Edict of Fontainebleau, Frederick William I, Elector of Brandenburg declared the Edict of Potsdam (October 1685), giving free passage to Huguenot refugees and tax-free status to them for ten years. In the late 17th century, 150,000–200,000 Huguenots fled to England, the Netherlands, Prussia, Switzerland, and the English and Dutch overseas colonies. A significant community in France remained in the Cévennes region. A separate Protestant community, of the Lutheran faith, existed in the newly conquered province of Alsace, its status not affected by the Edict of Fontainebleau. Spain In the early 16th century, Spain had a different political and cultural milieu from its Western and Central European neighbours in several respects, which affected the mentality and the reaction of the nation towards the Reformation. Spain, which had only recently managed to complete the reconquest of the