Anna Symmes Harrison —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=9397919

Pope Gregory VII — Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=42718259

Antipope Clement III —
Photo Credit: By Bishop Otto of Freising - Public Domain, https://commons.wikimedia.org/w/index.php?curid=18556054

Hersfeld Abbey: church ruins — Hersfeld Abbey was an important Benedictine imperial abbey in the town of Bad Hersfeld in Hesse (formerly in Hesse-Nassau), Germany, at the confluence of the rivers Geisa, Haune and Fulda.
Photo Credit: By Markus Schweiß, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=518082

Conrad II of Italy — as king in a manuscript of the early 13th century
Photo Credit: By DennisPeterOlsson - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=93812004

Agnes of Waiblingen —
Photo Credit: By Hans Part - Public Domain, https://commons.wikimedia.org/w/index.php?curid=3428557

Bertha of Turin and her husband Henry IV —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=59793935

Bertha of Savoy —
Photo Credit: By John Foxe - CC0, https://commons.wikimedia.org/w/index.php?curid=65740276

Henry IV, Holy Roman Emperor — from "Heinrich IV. in Canossa. Originalzeichnung von H. Plüddemann."
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=18305427

Henry III, Holy Roman Emperor —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=8303609

Gunhilda of Denmark —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=9651402