Museo Galileo
Virtual Museum
Surveyor's square
    • Setting:
      Room VI
    • Maker:
      Domenico Lusverg
    • Place:
    • Date:
    • Materials:
    • Dimensions:
      diameter 83 mm, height 143 mm
    • Inventory:
    • Surveyor's square (Inv. 681)

Surveyors' square consisting of a hollow cylinder with eight vertical slits placed 45° apart from one another. The cylinder base has a central fitting to attach the instrument to a tripod (now missing). The upper part is closed by a disk with a graduated rim; there is a magnetic compass in the center, with a cover and an alidade with viewers. The upper part was used for surveying, while the cylinder with the eight slits was used to trace perpendicular alignments and 45° angles. Signed by Domenico Lusverg. Provenance: Medici collections.