Sentence:  Upon the death of Theodoric in 526, Ibidus retired from public life to compose his celebrated work (whose pure Ciceronian style is as remarkable a case of classic <WSD>atavism</WSD> as is the verse of Claudius Claudianus, who flourished a century before Ibidus); but he was later recalled to scenes of pomp to act as court rhetorician for Theodatus, nephew of Theodoric. 
Meaning of the word marked with <WSD> tags:  The recurrence or reversion to a past behaviour, method, characteristic or style after a long period of absence.