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How long was a Spann unit of measurement in the Habsburg territories during the seventeenth century?

My research involves reconstructing architectural plans from textual descriptions in Central European archives. The term “Spann” appears frequently in 17th-century Habsburg construction documents. To accurately translate these plans into modern diagrams, I need a reliable conversion for this unit across the century.

 

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By Krishnadas Answered 2 years ago

Handling this requires understanding that “Habsburg territories” implies significant local variation. Throughout the 17th century, a Spann wasn’t a fixed metric length but a anthropic unit. My work with trade guild records shows it was often standardized locally against a Fuß (foot). For general scholarly purposes, using a range of 22–25 cm is defendable for most German-speaking Habsburg regions. I would recommend always cross-referencing with a known local measure, like the Wiener Fuß (Vienna foot), which was about 31.6 cm, where 1 Spann was often defined as 3/4 of a Vierling (a quarter-foot).

 

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