Builder's signature

"[15] In 2018, Gaye Lebaron reported the presence of "a signature on a beam in the north tower of the Petaluma's old silk mill dated January 22, 1927.

"[16] The Hanson Meeting hall at the New England Wireless and Steam Museum in East Greenwich, Rhode Island features a signature by W.B.

[17] In 1998, Calvin Kendall described a builder's signature located on the portico of the Archbasilica of Saint John Lateran, explaining that "when the Romanesque façade was added in 1170 to the east front of the basilica of Saint John Lateran in Rome, the architect Niccolo di Angelo signed his name on the right-hand pier of the portico beneath the verse inscription of the architrave.

[21] Restoration crews discovered names and dates inside the finials and the capitol responded by hiring researchers to identify the workmen.

For example, in 2019, it was reported that American president Donald J. Trump signed his name in sharpie on the Mexico–United States border wall.