Tiberius Avidius Quietus

Tiberius Avidius Quietus (died by 107) was a Roman politician the lived between the 1st century and the 2nd century.

Quietus came from a wealthy, distinguished and well connected political family in Faventia (modern Faenza, Italy). Quietus had a brother called Gaius Avidius Nigrinus, had two nephews a younger Gaius Avidius Nigrinus and Titus Avidius Quietus and was a great paternal uncle to Roman Emperor Hadrian's daughter-in-law Avidia Plautia. Quietus and his family may have been related to the consul Gaius Petronius Pontius Nigrinus, who had served his consulship at the time that the Roman Emperor Tiberius had died in 37.

Quietus was made governor of Roman Britain in 97 and held the post until 100. He also served at an unknown date being the Proconsul of Achaea.

Among his friends was the late philosopher Publius Clodius Thrasea Paetus, Greek Historian Plutarch and Roman Senator Pliny the Younger. Plutarch dedicated to Quietus his treaty entitled ‘On Divine Vengeance’. Also Plutarch dedicated a writing piece to Quietus and his brother Nigrinus entitled ‘On Brotherly Love’.

Quietus married an unnamed Roman woman and had a son a younger Tiberius Avidius Quietus. The younger Avidius Quietus was suffect consul in 111, Proconsul of Asia and Proconsul of the Africa Province in 125 or 126.