The tanning tradition of Bosa dates back to ancient Rome. Rediscovered in the 17th century, it grew until it became a very successful business, from the second half of the 19th century throughout the first half of the 20th century. The business gradually slowed down over time, and finally stopped in the second half of the 20th century.
About thirty companies were active, which left memories in Sas Conzas, appearing in a line along the left margin of the Temo River, near Ponte Vecchio.
The structures were built with rocks, mud and lime, and plastered with pink trachyte, side by side, like the typical coloured dwellings of the Sa Costa neighbourhood. They have two stories and a wooden roof. The ground floor contained wells, presses and tubs where the hides were immerged for tanning, dyeing and washing. The upper floor was dedicated to finishing.
A 18th-century tannery houses the Museo delle Conce.
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