Joseph Planta studied
philology at
University of Utrecht and
University of Göttingen. He served as secretary to the
British minister (i.e. ambassador) at Brussels, who at that time was
William Gordon. On the death of Andreas Planta, Joseph returned home to London, and immediately succeeded his father as assistant librarian at the British Museum. He was promoted to keeper of manuscripts in 1776 and then Principal Librarian, i.e. director, from 1799 until his death in 1827. At the British Museum, Planta produced a library catalogue for the
Cotton manuscripts. As Under Librarian, Planta organized the rehousing of the museum's coin collection. His time as Principal Librarian was a significant period in the history of the British Museum. Joseph Planta was elected a
Fellow of the Royal Society in 1774. Soon afterwards Planta was appointed as an assistant at the British Museum, he published a paper on the
Romansh language of the area of Switzerland in which he was born in the
Philosophical Transactions of the Royal Society of London. The paper was read to the
Royal Society on 10 November 1775. He was also appointed as one of the secretaries to the Royal Society in 1776. ==Marriage and children==