Lucius Volusius Maecianus (c. 110 – 175) was a Roman jurist, who advised the Emperor Antoninus Pius on legal matters, as well educating his son the future Marcus Aurelius in the subject.
Originally of the equestrian class, Maecianus held a series of imperial offices culminating with prefect of Egypt in 161, when Marcus Aurelius adlected him inter praetorios, or with the rank of praetor, into the Roman Senate.
[3] This inscription attests that he was prefect of the Cohort I Aelia classica, and prefectus fabrum, two steps in the tres militiae of the equestrian class.
According to Anthony Birley this was done so Maecianus "could remain in Rome, where he would be available to give advice on legal problems in the council -- one of those experts to whom, Marcus [Aurelius] relates, Pius was so ready to listen.
Following his promotion to the Senate, Marcus Aurelius appointed Maecianus prefect of the aerarium Saturni so, as Birley explains, the emperor "was able to keep this eminent lawyer, his former tutor, by his side.