Claims

The Washington Monument's aluminum apex weighs 100 oz and is inscribed 'Laus Deo'

Documented · occurred What these labels mean →

The Washington Monument was completed on 6 Dec 1884 by placing an 8.9-inch, 100-ounce pyramid of solid aluminum atop the capstone; the aluminum apex is inscribed 'Laus Deo' ('Praise be to God'). The monument's cornerstone was laid on 4 Jul 1848 by Grand Master Benjamin B. French, using the Masonic gavel Washington had used at the Capitol in 1793 (the video says 'trowel').

Evidence

RelationRecordNote
documentsnps.govNPS: construction completed with 'an 8.9 inch tall, 100-ounce pyramid of solid aluminum atop the capstone'
documentsevolutiondc.museum.gwu.eduGWU Museum (Evolution of DC): 'Inscribed on the capstone is the Latin phrase "Laus Deo", meaning "Praise be to God"'; 100 ounces, under nine inches
documentsnpshistory.comNPS 'Washington Monument: A History', ch. 2: cornerstone laid Sunday 4 Jul 1848 by Grandmaster Benjamin B. French, wearing Washington's apron and wielding 'the same Mason's gavel' Washington used at the Capitol on 18 Sep 1793
documentsnps.govNPS: Washington Monument

Sources

SourceRelationAt
DC Masonic symbolism (Camp Gagnon)asserts

Claim

The Washington Monument was completed on 6 Dec 1884 by placing an 8.9-inch, 100-ounce pyramid of solid aluminum atop the capstone; the aluminum apex is inscribed 'Laus Deo' ('Praise be to God'). The monument's cornerstone was laid on 4 Jul 1848 by Grand Master Benjamin B. French, using the Masonic gavel Washington had used at the Capitol in 1793 (the video says 'trowel').