The Edict remained unaltered in effect, registered by the parliaments as "fundamental and irrevocable law," with the exception of the "brevets," which had been granted for a period of eight years, and were renewed by Henry in 1606 and in 1611 by Marie de Médecis, who confirmed the Edict within a week of the assassination of Henry, stilling Protestant fears of another St. Bartholomew's Day massacre. The subsidies had been reduced by degrees, as Henry gained more control of the nation. By the peace of Montpellier in 1622, concluding a Huguenot revolt in Languedoc, the fortified Protestant towns were reduced to two, La Rochelle and Montauban. The "brevets" were entirely withdrawn in 1629, by Louis XIII, following the Siege of La Rochelle, in which Cardinal Richelieu blockaded the city for fourteen months.