Antonio de Marco Magliabechi

He was born at Florence, the son of a burgher named Marco Magliabechi, and Ginevra Baldorietta.
Although Magliabechi was apprenticed to a goldsmith, and worked in this capacity until his fortieth year, Michele Ermini, librarian to Cardinal de' Medici, recognized his academic ability and taught him Latin, Greek, and Hebrew.

In 1673 he became librarian to Cosimo III de' Medici, Grand Duke of Tuscany. Magliabechi became the central figure of literary life in Florence, and scholars of every nation sought his acquaintance and corresponded with him. Whilst this eminent post gave him considerable prominence, he is remembered more for his personal characteristics and his vast store of self-acquired learning. He has been described as a literary glutton, and the most rational of bibliomaniacs, inasmuch as he read everything he bought. His own library consisted of 40,000 books and 10,000 manuscripts. His house literally overflowed with books; the stairways were lined with them, and they even filled the front porch. Many stories are told of his marvellous memory that was "like wax to receive and marble to retain."

In worldly matters, Magliabechi was extremely negligent. *Reputedly, he once even forgot to draw his salary for over a year. *He wore his clothes until they fell from him, and thought it a great waste of time to undress at night, "life being so short and books so plentiful".
*He welcomed all inquiring scholars, provided they did not disturb him while at work.

Stories about Magliabechi abound. Apparently, he was a man of a most forbidding and savage aspect, and exceedingly negligent of his person. He refused to be waited upon. His dinner was commonly three hard-boiled eggs, with a draught of water. He had a small window in his door, through which he could see all those who approached him; and if he did not wish for their company, he would not admit them. He spent some hours in each day at the palace library; but is said never in his life to have gone farther from Florence than to Prato, whither he once accompanied Cardinal Henry Norris, librarian at the Vatican, to see a manuscript.

PS : If he memorised the complete library of the Grand Duke of Tuscany, we can do it, too