The name of this tribe seems to have survived in latter-day regional toponyms – Georgian Basiani, Greek Phasiane, Armenian Basean, and Turkish Pasin.
In 1001, after the death of David Kuropalates, Basean/Basiani were inherited by Byzantine Emperor Basil II, who annexed the Armenian lands (Tayk/Tao, Basean/Basiani), captured by King David Kuropalates to Byzantium[4] and organized them into the theme of Iberia with the capital at Theodosiopolis, forcing the successor Georgian Bagratid ruler Bagrat III to recognize the new rearrangement.
While Basil II was preoccupied with his Bulgarian campaigns, George gained momentum to invade Tao and Basiani in 1014, which caused unsuccessful Byzantine-Georgian wars.
In 1048 and 1049, the Seljuk Turks under Ibrahim Yinal made their first incursion into the Byzantine frontier region of Iberia and defeated a combined Byzantine-Georgian army of 50,000 at the Battle of Kapetrou on 10 September 1048.
The province was part of the Kingdom of Georgia, and then of Principality of Samtskhe until 1545, when Basiani was finally conquered by the Ottoman Empire.