Barthélemy Hervart

He saved the French monarchy on several occasions during the Fronde, the series of civil wars in France in the mid-17th century, by means of important loans, and during the period of the fall of Louis XIV's Superintendent of Finance Nicolas Fouquet.

Esther (junior) married Charles III de La Tour du Pin [fr], and they had six children of whom four lived to be adults.

Initially an arms dealer, Herwart was Army paymaster for Bernard de Saxe-Weimar, a general in the Thirty Years War.

When the general died in 1639, Hervart was put in charge of negotiating with Cardinal Richelieu for the reincorporation of Bernard's troops into the service of King Louis XIII.

This culminated in the signing of the Treaty of Breisach on 9 October 1639, which in turn allowed Barthélemy and his brother Jean Henry to acquire French nationality and land in Alsace at Huningue, as well as the estate at Landser.

Other partners included Madame Van Ens (heir of her husband), Octavio de Strada of Dutch origin, Michel Lucas, and Jean François Genoyer.

On 31 October 1653, articles were drawn up concerning the rules and regulations concerning the drainage operation and covered the management of the work and the responsibility of the associates.

It also imposed a requirement to meet yearly on 16 August to "advise and organize the affairs of the company, and to proceed with the nomination of a Director."