In 1800 he was elected a full Academician, and in 1810 the academy appointed him to the specially created post of Professor of Sculpture. He was a thorough and judicious teacher, and his lectures were often reprinted. According to
Sidney Colvin writing in the
Encyclopædia Britannica Eleventh Edition: "With many excellent observations, and with one singular merit—that of doing justice, as in those days justice was hardly ever done, to the sculpture of the medieval schools—these lectures lack point and felicity of expression, just as they are reported to have lacked fire in delivery, and are somewhat heavy reading." His most important sculptural works from the years following this appointment were the monument to Mrs Baring in
Micheldever church, the richest of all his monuments in relief (1805–1811); that for the Cooke-Yarborough family at
Campsall church,
Yorkshire, those to Sir
Joshua Reynolds for St Paul's (1807); to Captain Webbe for India (1810); to Captains Walker and Beckett for Leeds (1811); to Lord Cornwallis for Prince of Wales's Island (1812); and to
Sir John Moore for Glasgow (1813). He was commissioned to create the monument to
Matthew Boulton (died 1809), by Boulton's son, which is on the north wall of the
sanctuary of
St. Mary's Church, Handsworth,
Birmingham, where Boulton is buried. It includes a marble bust of Boulton, set in a circular opening above two
putti, one holding an engraving of the
Soho Manufactory. Around this time there was much debate over the merits of the sculptures from the
Parthenon in Athens, which had been brought to Britain by Lord Elgin, and were hence popularly known as the
Elgin Marbles. When Flaxman first saw them at Elgin's house in 1807, he advised against their restoration. Flaxman's statements in favour of their purchase by the government to a parliamentary commission carried considerable weight; the sculptures were eventually bought in 1816. His designs for the friezes of
Ancient Drama and
Modern Drama, for the façade of the Theatre Royal, Covent Garden, made in 1809 and carved by
John Charles Felix Rossi, provide an early example of the direct influence of the marbles on British sculpture. In the years immediately following his Roman period he produced fewer outline designs for publication, except three for
William Cowper's translations of the
Latin poems of
John Milton (1810). In 1817, however, he returned to the genre, publishing a set of designs to
Hesiod, which were engraved by Blake. He also designed work for goldsmiths at around this time—a testimonial cup in honour of
John Kemble, and the famous and beautiful (though quite un-
Homeric) "Shield of
Achilles" designed between 1810 and 1817 for
Rundell, Bridge and Rundell. Other late works included a frieze of
Peace, Liberty and Plenty, for
John Russell, 6th Duke of Bedford's sculpture gallery at
Woburn Abbey, and a heroic group of St Michael overthrowing Satan, for
George Wyndham, 3rd Earl of Egremont's
Petworth House, delivered after Flaxman's death. He also wrote several articles on art and archaeology for
Rees's Cyclopædia (1819–20). (1821–1826) In the last six years of his life, Flaxman designed decorations for the façades of
Buckingham Palace. Some of his drawings for this commission are now held by the
Royal Collection Trust.
Flaxman Terrace in
Bloomsbury, London, is named after him. The Chelsea telephone exchange that became 020 7352 was also named after him, the digits 352 still corresponding to the old three-letter dialling code FLA. ==Studio practice==