Antique, but near-faithful (but a bit smaller ) copy of the ‘Isa ibn Allahdad’ astrolabe of Lahore. Pakistan

1722

Inscription: 1582 after Mohamed Probably about 1900

1900

Arabische KAMAL, Teak replica with knots for the latitude of Abu Dhabi 24°28’, Dubai 25°16’, Manama 26°12’ and Koeweit 29°23’

2016

Reconstruction of a Sun-Compass and Sun Shadow Board according to artefact found in the ruins of a Benedictine convent in Uunartoq, Greenland, in 1948
Is was probably used by Greenland Vikings about 1200

2016

Icelandic Calcite. Cordierite or Iceland spar. Used by Vikings in 800-1050 to find the sun in cloudy weather or beneath the horizon

2017