Han Xuan Di —
Photo Credit: By Bnu gaoyong - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18754172

Personal stamp of Liu He —
Photo Credit: By Siyuwj - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=52922904

Emperor Zhao of Han —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=2233726

Traditional portrait of Emperor Wu of Han —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=8151462

Central Hall and the lake, University of York —
Photo Credit: By Philip Pankhurst, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=8728074

University of York coat of arms —
Photo Credit: By Paggley - Own work, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=9494232

Gavin Wood — Speaking in 2015
Photo Credit: By OuiShare - https://www.flickr.com/photos/ouishare/27343886146/in/photolist-HEhyGS, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=64232387

The solidity language logo —
Photo Credit: By Ethereum Foundation - https://solidity.readthedocs.io/en/develop/_images/logo.svg, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=64533335

Ethereum icon —
Photo Credit: By GitR0n1n - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=87492216

Vitalik Buterin receives Honorary Doctorate — From the Faculty of Business and Economics of the University of Basel on the occasion of the Dies Academicus on 30 November 2018
Photo Credit: https://cif.unibas.ch/en/blog/details/news/vitalik-buterin-receives-honorary-doctorate/

Davis Computer Research Centre, UWaterloo — The William G. Davis Computer Research Centre houses teaching facilities and a library for engineering, mathematics and science.
Photo Credit: By Victor Vucicevich - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=22533119