Anastasia was the daughter of Roman Emperor Constantius Chlorus and Flavia Maximiana Theodora, and half sister of Emperor Constantine I. Emperor Constantine proposed marrying her to form an alliance with Bassianus; however, Bassianus was found to be plotting against Constantine and the marriage was called off.
Dost thou have sources for such claims? Oft thee posts such incredible pictures though without proper citation of their origin. Doubt of their authenticity often follows unfortunately.