Early life Dee was born in
Tower Ward, London, to Rowland Dee, of Welsh descent, and Johanna, daughter of William Wild. His surname "Dee" is an anglicisation of
Welsh du (). His grandfather was Bedo Ddu of Nant-y-groes,
Pilleth,
Radnorshire; John retained his connection with the locality. His father, Roland, was a
mercer (cloth merchant) and gentleman
courtier to
Henry VIII. Dee traced descent from
Rhodri the Great, 9th-century ruler of the
Kingdom of Gwynedd, and constructed a pedigree accordingly. His family had arrived in London around the time of Henry Tudor's coronation as
Henry VII. Dee attended
Chelmsford Chantry School (now
King Edward VI Grammar School, Chelmsford) from 1535 to 1542. He entered
St John's College, Cambridge in November 1542, aged 15, graduating with a
BA in 1545 or early 1546. His abilities recognised, he became an original fellow of
Trinity College, Cambridge upon its foundation by Henry VIII in 1546. At Trinity, he designed stage effects for a production of
Aristophanes's
Peace. Using pulleys and mirrors, Dee created the illusion of "the Scarabeus flying up to Jupiter's palace" in a mechanical contrivance, possibly based on rediscovered classical techniques. Dee would later claim this to be the source of his reputation as a magician. In the late 1540s and early 1550s, he travelled around Europe, studying at the
Old University of Leuven (1548) and
Brussels and lecturing in Paris on
Euclid. He studied under
Gemma Frisius and became friends with the
cartographers
Gerardus Mercator and
Abraham Ortelius. Dee also met, worked with and learnt from other continental mathematicians, such as
Federico Commandino in
Italy. He returned to England with a major collection of mathematical and astronomical instruments. In 1552, he met
Gerolamo Cardano in London, with whom he investigated a purported
perpetual motion machine and a
gem supposed to have magical properties.
Working life Rector at
Upton-upon-Severn from 1553, Dee was offered a readership in mathematics at
Oxford University in 1554 but declined it, citing as offensive English universities' emphasis on
rhetoric and
grammar (which, together with
logic, formed the academic
trivium) over philosophy and science (the more advanced
quadrivium, composed of arithmetic, geometry, music and astronomy). He was busy with writing and perhaps hoped for a better position at court. On 17 February 1554, Dee took Catholic orders in the midst of the
Marian reaction. The Catholic bishop
Edmund Bonner, likely already a close friend of Dee's at this point, gave him special permission to receive all of the
holy orders from first
tonsure to priesthood in only a single day. In 1555, Dee joined the
Worshipful Company of Mercers, as his father had, through its system of
patrimony. In that same year, Dee was arrested and charged with "lewd and vain practices of calculating and conjuring" because he had cast
horoscopes of
Mary I of England and
Princess Elizabeth. The charges were raised to
treason against Mary. Dee appeared in the
Star Chamber and exonerated himself, but he was turned over to Bonner for religious examination. His strong, lifelong penchant for secrecy may have worsened matters. The episode was the most dramatic in a series of attacks and slanders that dogged Dee throughout his life. At some point, possibly before his charges were officially dismissed, Dee became Bonner's chaplain. In some early editions of
John Foxe's
Acts and Monuments, Dee, as Bonner's chaplain, is recorded debating the
real presence of Christ in the Eucharist with Protestant prisoner Robert Smith (who accused Dee of
Marcionism because his argument in favor of
transubstantiation rested on the idea that
Jesus possessed only a spiritual body) and participating in the seventh examination of
John Philpot. Dee presented Queen Mary in 1556 with a visionary plan to preserve old books, manuscripts, and records and to found a national library, but it was not taken up. Instead, he expanded his personal library in
Mortlake, acquiring books and manuscripts in England and on
the Continent. Dee's library, a centre of learning outside the universities, became the greatest in England and attracted many scholars. , whose meaning he explained in
Monas Hieroglyphica When Elizabeth succeeded to the throne in 1558, Dee became her astrological and scientific advisor. He chose her coronation date and even became a Protestant. From the 1550s to the 1570s, he served as an advisor to England's voyages of discovery, providing technical aid in navigation and political support to create a "
British Empire", a term he was the first to use. Dee wrote in October 1574 to
William Cecil, 1st Baron Burghley seeking patronage. He said he had occult knowledge of treasure in the
Welsh Marches and of valuable manuscripts kept at
Wigmore Castle, knowing that the
Lord Treasurer's ancestors came from the area. In 1564, Dee wrote the
Hermetic work
Monas Hieroglyphica (
The Hieroglyphic Monad), an exhaustive
Christian Kabbalistic interpretation of a
glyph of his own design, meant to express the mystical unity of all creation. Having dedicated it to
Maximilian II, Holy Roman Emperor in an effort to gain patronage, Dee attempted to present it to him at the time of his ascension to the throne of
Hungary. The work was esteemed by many of Dee's contemporaries, and the royal secret service valued its treatise on cryptography, but it cannot be fully understood today in the absence of the secret oral tradition of that era. His 1570 "Mathematical Preface" to
Henry Billingsley's English translation of ''
Euclid's Elements'' argued for the importance of mathematics as an influence on the other arts and sciences. Intended for an audience outside the universities, it proved to be Dee's most widely influential and frequently reprinted work. In 1577, Dee published , a work setting out his vision of a maritime empire and asserting English territorial claims on the
New World. Dee was acquainted with
Humphrey Gilbert and close to
Philip Sidney and his circle.
Later life By the early 1580s, Dee was discontented with his progress in learning the secrets of nature and his diminishing influence and recognition in court circles. Failure of his ideas concerning a proposed calendar revision, the colonial establishment, and the ambivalent results of voyages of exploration in
North America had nearly brought his hopes of political patronage to an end. He subsequently began to turn energetically towards the
supernatural as a means of acquiring knowledge. He sought to contact spirits through
scrying, which he thought would act as an intermediary between himself and the angels. Dee's first attempts with scryers were unsatisfactory, but in 1582, he met
Edward Kelley (then calling himself Edward Talbot), who impressed him greatly with his abilities. Dee took Kelley into his service and began to devote all his energies to his supernatural pursuits. These "spiritual conferences" or "actions" were conducted with intense Christian piety, always after periods of purification,
prayer and
fasting. Dee was convinced of the benefits they could bring to humankind. The character of Kelley is harder to assess: some conclude that he acted with cynicism, but delusion or self-deception cannot be ruled out. Kelley's 'output' is remarkable for its volume, intricacy and vividness. Dee records in his journals that angels dictated several books to him this way, through Kelley, some in a special angelic or
Enochian language. In 1583, Dee met the impoverished yet popular Polish nobleman
Albert Łaski, who, after overstaying his welcome at court, invited Dee to accompany him back to
Poland. With some prompting by the "angels" (again through Kelley) and by dint of his worsening status at court, Dee decided to do so. He, Kelley, and their families left in September 1583, but Łaski proved to be bankrupt and out of favour in his own country. Dee and Kelley began a
nomadic life in Central Europe, meanwhile continuing their spiritual conferences, which Dee detailed in his diaries and almanacs. They had audiences with
Emperor Rudolf II in
Prague Castle and King
Stephen Báthory of Poland, whom they attempted to convince of the importance of angelic communication. The Bathory meeting took place at the
Niepołomice Castle (near
Kraków, then capital of Poland) and was later analysed by Polish historians (Ryszard Zieliński, Roman Żelewski, Roman Bugaj) and writers (Waldemar Łysiak). While Dee was generally seen as a man of deep knowledge, he was mistrusted for his connection with the English monarch, Elizabeth I, for whom some thought Dee was a spy. Dee did indeed pen a covert letter to spymaster
Francis Walsingham in which he said "I am forced to be brief...That which England suspected was also here". The Polish king, a devout Catholic and cautious of supernatural mediators, began their meeting(s) by affirming that prophetic revelations must match the
teachings of Jesus, the mission of the
Catholic Church, and the approval of the sitting
pope. In 1587, at a spiritual conference in the
Kingdom of Bohemia, Kelley told Dee that the angel
Uriel had ordered the men to share all their possessions, including their wives. By this time, Kelley had gained some renown as an
alchemist and was more sought after than Dee in this regard: it was a line of work with prospects for serious, long-term financial gain, especially among the royal families of central Europe. Dee, however, was more interested in communicating with angels, who he believed would help him solve the mysteries of the heavens through mathematics, optics, astrology, science, and navigation. Perhaps Kelley, in fact, wished to end Dee's dependence on him as a diviner during their increasingly lengthy, frequent spiritual conferences. The order for wife-sharing caused Dee anguish, but he apparently did not doubt it was genuine, and they apparently shared wives. However, Dee broke off the conferences immediately afterwards. He returned to England in 1589, while Kelley went on to be the alchemist to Emperor Rudolf II. Nine months later, on 28 February 1588, a son was born to Dee's wife, whom Dee baptised Theodorus Trebonianus Dee and raised as his own.
Final years Dee returned to
Mortlake after six years abroad to find his home vandalised, his library ruined, and many of his prized books and instruments stolen. Furthermore, he found that increasing criticism of
occult practices had made England still less hospitable to his magical practices and natural philosophy. He sought support from Elizabeth, who hoped he could persuade Kelley to return and ease England's economic burdens through alchemy. She finally appointed Dee the warden of
Christ's College, Manchester, in 1595. This former College of Priests had been re-established as a Protestant institution by royal charter in 1578. However, he could not exert much control over its fellows, who despised or cheated him. Early in his tenure, he was consulted on the
demonic possession of seven children; he took little interest in the case but allowed those involved to consult his still-extensive library. Dee left Manchester in 1605 to return to London, but remained warden until his death. By that time, Elizabeth was dead and
James I gave him no support. Dee spent his final years in poverty at Mortlake, forced to sell various possessions to support himself and his daughter, Katherine, who cared for him until his death there late in 1608 or early in 1609, aged 81. His precise date of death is unknown, as both the parish registers and Dee's gravestone are missing. In 2013, a memorial plaque to Dee was placed on the south wall of the present church. ==Personal life==