The edict is often read backwards, as an early statement of religious freedom. It is better read as a peace treaty between two armed parties, one of which was permitted to keep its fortresses. Its own preamble presents the arrangement as provisional, a means of keeping the peace until the kingdom can be reunited in one faith, and it grants nothing to anyone outside the two Christian confessions it names.
The fortified towns are the clearest evidence of that reading, and they were also the settlement's weak point. A minority with garrisons was a state within the state, and after Henry IV was assassinated in 1610 the arrangement began to unwind. The wars of the 1620s ended with the fall of La Rochelle in 1628, and the Peace of Alais in 1629 stripped the Huguenots of their military and political privileges while confirming the religious clauses.
What remained after 1629 was a confessional liberty without power to defend it, and successive royal interpretations narrowed it for half a century: places of worship closed on technical grounds, professions closed one by one, children permitted to convert at seven. By the time Louis XIV revoked the edict in 1685 he could claim, with a certain accuracy, that there was little left to revoke.
The atlas records the edict as repealed rather than spent, because unlike most of its neighbours here it was killed by a named instrument on a known date.