nufacturing of wool and leather but gradually economic decline set in. After a brief period of economic prosperity in the 15th century, the city's economy suffered during the wars of religion of the 16th and 17th centuries, and recovery did not happen until the industrial revolution in the early 19th century.
16th to 19th century
The important strategic location of Maastricht resulted in the construction of an impressive array of fortifications around the city during this period. The Spanish and Dutch garrisons became an important factor in the city's economy. In 1579 the city was sacked by the Spanish army under general Alexander Farnese, Duke of Parma (Siege of Maastricht, 1579). For over fifty years the Spanish crown took over the role of the dukes of Brabant in the joint sovereignty over Maastricht. In 1632 the city was conquered by Frederick Henry, Prince of Orange and the Dutch States General replaced the Spanish crown in the joint government of Maastricht.
Another Siege of Maastricht (1673) took place during the Franco-Dutch War. In June 1673, Louis XIV laid siege to the city because French battle supply lines were being threatened. During this siege, Vauban, the famous French military engineer, developed a new strategy in order to break down the strong fortifications surrounding Maastricht. His systematic approach remained the standard method of attacking fortresses until the 20th century. On 25 June 1673, while preparing to storm the city, captain-lieutenant Charles de Batz de Castelmore, also known as the comte d'Artagnan, was killed by a musket shot outside Tongerse Poort. This event was immortalized inAlexandre Dumas' novel The Vicomte de Bragelonne, part of the D'Artagnan Romances (D'Artagnan is one of the Mousquetaires du Roi, or Three Musketeers, in this series). French troops occupied Maastricht from 1673 to 1678.
In 1748 the French once again conquered the city at what is known as
