The apothecaries of the rue de l’Arbre-Sec in Paris in the 17th century – The mud tax imposed by the king in 1637 to pay for street-cleaning is a useful tool for identifying the people who were liable for the tax, their profession, and whether they were owners or tenants. The survey of the Rue de l’Arbre-Sec, a very old street in Paris close to the Louvre, reveals that seven apothecaries lived there in 1637. Two of them were particularly important : Hiérosme Lambert, who had an apothecary’shop near the church of Saint-Germain-l’Auxerrois, and Michel Dansse, apothecary to Queen Anne of Austria. The two families established links through the marriage of Marie Lambert, the daughter of Hiérosme Lambert and Marie Gauché, to Michel Dansse. One of...