Events By place Roman Empire Roman settlement in present-day Wiesbaden, Germany is first mentioned. Hadrian fixes the border between Roman Britain and Caledonia on a line running from the River Tyne to the Solway Firth. The Temple of Venus is built in Rome. Asia Era name changes from Yongning (2nd year) to Jianguang in the Chinese Eastern Han Dynasty. Births April 26 — Marcus Annius Verus, later the Roman Emperor Marcus Aurelius Deaths Cai Lun, Chinese inventor of paper and the… (More on 121)