Copernicus' heliocentric model — from De Revolutionibus Orbium Coelestium
Photo Credit: By Nicolai CoperniciCreated in vector format by Scewing - [1], Public Domain, https://commons.wikimedia.org/w/index.php?curid=31611378

Kepler's Starmap showing his Supernova — Johannes Kepler's original drawing from De Stella Nova (1606) depicting the location of the stella nova, marked with an N (8 grid squares down, 4 over from the left)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=749487

De Stella Nova opened to the starmap foldout —
Photo Credit: By Johannes Kepler - http://www.jpl.nasa.gov/news/features.cfm?feature=665, Public Domain, https://commons.wikimedia.org/w/index.php?curid=763909

X-ray, Optical & Infrared Composite of Kepler's Supernova Remnant — On October 9, 1604, sky watchers -- including astronomer Johannes Kepler, spotted a "new star" in the western sky, rivaling the brilliance of nearby planets. "Kepler's supernova" was the last exploding supernova seen in our Milky Way galaxy. Observers used only their eyes to study it, because the telescope had not yet been invented.
Photo Credit: By NASA/ESA/JHU/R.Sankrit & W.Blair - http://www.nasa.gov/multimedia/imagegallery/image_feature_219.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=14301

De revolutionibus, 1543, title page — by Copernicus
Photo Credit: Public Domain https://en.wikipedia.org/wiki/File:Nicolai_Copernici_torinensis_De_revolutionibus_orbium_coelestium.djvu

Copernicus — Nicolaus Copernicus portrait from Town Hall in Toruń - 1580)
Photo Credit: By Unknown - http://www.frombork.art.pl/Ang10.htm, Public Domain, https://commons.wikimedia.org/w/index.php?curid=113500

A plate from Astronomiae Pars Optica — Illustrates the structure of eyes of various species
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=763931

Title Page of Kepler's Astronomiae pars optica —
Photo Credit: By Kepler, Johannes - Available in the BEIC digital library and uploaded in partnership with BEIC Foundation., Public Domain, https://commons.wikimedia.org/w/index.php?curid=38722962

Geometrical harmonies in the perfect solids — from Harmonices Mundi (1619)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=1786757

Statue of Kepler in Linz — Statue of Johannes Kepler in gardens at the Linzer Schloss. Kepler lived and worked in Linz (from 1612 to 1630), and a university there bears his name.
Photo Credit: By Aldaron, a.k.a. Aldaron - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=5588115

Mars apparent retrograde motion — Diagram of the geocentric trajectory of Mars through several periods of apparent retrograde motion (Astronomia nova, Chapter 1, 1609)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=1164908