rope stretcher

File:Rope stretching.jpg, TT69.]]

In ancient Egypt, a rope stretcher (or harpedonaptai) was a surveyor who measured real property demarcations and foundations using knotted cords, stretched so the rope did not sag. The practice is depicted in tomb paintings of the Theban Necropolis.{{cite book |url=https://books.google.com/books?id=n-4eWtgEXjoC&pg=PT282 |page=282 |title=Evidence and Procedures for Boundary Location |isbn=9780470901601 |last1=Robillard |first1=Walter G. |last2=Wilson |first2=Donald A. |last3=Brown |first3=Curtis M. |last4=Eldridge |first4=Winfield |date=31 January 2011 |publisher=John Wiley & Sons }} Rope stretchers used 3-4-5 triangles and the plummet,[http://www.petrie.ucl.ac.uk/search/main/textresult.php?objectname=plumb&find_location=&material=&period=&submit44=Search Petrie Museum website: plumbs] which are still in use by modern surveyors.

The commissioning of a new sacred building was a solemn occasion in which pharaohs and other high-ranking officials personally stretched ropes to define the foundation. This important ceremony, and therefore rope-stretching itself, are attested over 3000 years from the early dynastic period to the Ptolemaic kingdom.{{cite book |url=https://books.google.com/books?id=fWKYBgAAQBAJ&pg=PA98 |page=98 |title=Architecture and Mathematics from Antiquity to the Future: Volume I: Antiquity to the 1500s |isbn=9783319001371 |last1=Williams |first1=Kim|author1-link=Kim Williams (architect) |last2=Ostwald |first2=Michael J. |date=9 February 2015 |publisher=Birkhäuser }}

Rope stretching technology spread to ancient Greece and India, where it stimulated the development of geometry and mathematics.