Pomponia Graecina
She was the wife of Aulus Plautius , the general who led the Roman conquest of Britain in 43 AD , and was renowned as one of the few people who dared to publicly mourn the death of a kinswoman ( Julia Livia , granddaughter of emperor Tiberius ) killed by the Imperial family . 
<triplet> Aulus Plautius <subj> Roman conquest of Britain <obj> significant event