Anne of Denmark — cropped
Photo Credit: By Attributed to John de Critz - Public Domain, https://commons.wikimedia.org/w/index.php?curid=142090

Queen Sophie, wife of King Frederick II of Denmark — cropped
Photo Credit: By Hans Knieper - Public Domain, https://commons.wikimedia.org/w/index.php?curid=974648

Coat of arms of Norway —
Photo Credit: By Damian Szczepaniak - Public Domain, https://commons.wikimedia.org/w/index.php?curid=1828604

King Frederik II builds Kronborg Castle at Elsinore —
Photo Credit: By Nicolai Abildgaard - Public Domain, https://commons.wikimedia.org/w/index.php?curid=43078855

Frederik II (1581) — cropped
Photo Credit: By Hans Knieper - Public Domain, https://commons.wikimedia.org/w/index.php?curid=12047806

Kronborg Castle — The setting of Shakespeare's Hamlet: Elsinore is is the anglicized version of the castle's location - Helsingor (Denmark)
Photo Credit: By Artico2 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=12692756

Ferdinand I in 1531 — cropped
Photo Credit: By Jan Cornelisz Vermeyen, Public Domain, https://commons.wikimedia.org/w/index.php?curid=71130927

Maximilian II, c. 1566 —
Photo Credit: By Nicolas Neufchatel - Public Domain, https://commons.wikimedia.org/w/index.php?curid=5105059

Rudolf II —
Photo Credit: By Hans von Aachen -Public Domain, https://commons.wikimedia.org/w/index.php?curid=14699580

Rundetårn at University of Copenhagen — The Rundetårn (round tower) was used in the 17th century as an observatory by Ole Rømer.
Photo Credit: By Avda - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=27604636

Solar eclipse of August 21, 1560 — Greatest eclipse 12:30:55 UTC
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=16982913