。
She is said to have been rich.
Literal
She [topic-は] rich was [quotative-と] is-said.
言われている is the resulting-state passive form of 言う ('to say') — literally 'is in the state of being said' — used to convey hearsay or general consensus without naming the speaker. と marks the quoted content. Compared to ~そうだ (which conveys hearsay from a specific source), ~と言われている feels more like 'they say' or 'it is generally said' — diffuse public knowledge rather than a particular report.