King Conrad I — From the Spieghel Historiael of Jacob van Maerlant, c. 1330
Photo Credit: By unknown, West Flanders - Jacob van Maerlant, Spieghel Historiael, Public Domain, https://commons.wikimedia.org/w/index.php?curid=9940377

Cavendish's apparatus for making and collecting hydrogen —
Photo Credit: By Henry Cavendish - Philosophical Transactions Public Domain, https://commons.wikimedia.org/w/index.php?curid=3032102

Henry Cavendish — Frontispiece of The Life of the Hon. Henry Cavendish,
Photo Credit: By George Wilson - Public Domain, https://commons.wikimedia.org/w/index.php?curid=7373371

Otto I, Holy Roman Emperor —
Photo Credit: By Axel Mauruszat -Public Domain, https://commons.wikimedia.org/w/index.php?curid=30478215

Saint Matilda — Pfarrkirche hl. Pankratius, Kirchenweg 1, Kirnberg an der Mank, Niederösterreich - Glasfenster hl. Mathilde in der südlichen Seitenkapelle
Photo Credit: By BSonne - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=51843319

Legend of the German crown offered to Henry —
Photo Credit: By Zigarettenbildchen., Public Domain, https://commons.wikimedia.org/w/index.php?curid=198993

Quedlinburg castle and abbey —
Photo Credit: By A.Savin (Wikimedia Commons · WikiPhotoSpace) - Own work, FAL, https://commons.wikimedia.org/w/index.php?curid=77785231

King Henry and Matilda — detail from the Chronica sancti Pantaleonis, 12th century
Photo Credit: By Anonymous - Public Domain, https://commons.wikimedia.org/w/index.php?curid=8297297

Former Herford Abbey church, now Herford Minster —
Photo Credit: By "Ingo Kirschnereit Cyclejakob" - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=3560647

Saint Matilda —
Photo Credit: By https://wellcomeimages.org/indexplus/obf_images/10/d8/e1a0dff4a4e8ae41cde5f1e8a1dd.jpgGallery: https://wellcomeimages.org/indexplus/image/V0032626.htmlWellcome Collection gallery (2018-04-02):https://commons.wikimedia.org/w/index.php?curid=36604154

Coat of Arms of the Kingdom of Saxony 1806-1918 —
Photo Credit: By Glasshouse, using elements by Sodacan, Trondivers and katepanomegas - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=63892824