"John Speed’s Theatre of the Empire of Great Britaine is one of the world’s great cartographic treasures. Published in 1611/12, it marked the first time that comprehensive plans of English and Welsh counties and towns were made available in print. [..]
A slice of Tudor and Jacobean life in miniature, its influence was so great that it was used by armies on both sides of the English Civil War. [..]
The county maps were the first consistent attempt to show territorial divisions, but it was Speed’s town plans that were a major innovation and probably his greatest contribution to British cartography. Together, they formed the first printed collection of town plans of the British Isles and, for at least 50 of the 73 included in the Theatre, it was the first time these towns had been mapped."
[source]
A selection of the very rare hand-coloured proofs for the Speed atlas, produced between 1603 and 1611, is seen below. The collection of proofs was digitised recently by its owner, Cambridge University Library and prints of the maps are for
sale.

The Kingdome of Great Britaine & Ireland
Graven by I. Hondius and are able to be
ſolde by I Sudbury and George Humble in Popes head Alley in London.
Cum privilego Regis 1610

Cambridgeshire
Cambridgshire de
ſcribed with the devi
ſion of the hundreds, the Townes
ſituation, with the Armes of the Colleges of that famous Vniuer
ſiti. And al
ſo the Armes of all
ſuch Princes and noble men as haue heertofore borne the honorable tytles & dignities of the Earldome of Cambridg.
"This province is not large, nor the air greatly to be liked, having the Fenns so spread upon her North, that they infect the air far into the rest. The soil doth differ both in air and commodities; the Fenny surcharged with waters: the South is Champion, and yieldeth Corn in abundance, with Meadow-pastures upon both sides of the River Came."

Oxfordshire
Oxfordshire de
ſcribed with
(every?) Citie and the Armes of the Colledges of
(theyre?) famous Vniuer
ſity. Ao. 1605.
Performed by John Speede and are to be
ſold in popes head alley again
st the Exchange by IS & GH
Cum Privilegio.

Wight Island
De
ſcribed by William White Gent. Augmented and publi
ſhed by John Speed Citizen of London.

The Isle of Man
THE ISLE OF MAN Exactly de
ſcribed, and into
ſeveral Pari
ſhes diuided, with euery Towne, Village, Baye, Creke, and Riuer therein conteyned. The bordringe Coa
ſts wherewith it is circulated in their situations
ſett, and by the Compa
ſe accordingly
ſhewed, with their true di
ſtance from euery place unto this Island by a
ſeuerall scale ob
ſerued.
MAN by Cae
ſar called Mona, by plini Monabia, by ptol. Monoceda, and by Gildas Evbonia is an I
ſland
ſeated in the Ocean betwixt the kingdomes of England, Scotland and Ireland, it formerly bare the name of a kingdome, and hathbene populous and well inhabited very plentyfull of Cattell, Foule and Fy
ſhe, it is nowe deuided into
ſeauentene pari
ſhes, many Villages, and defended by twoe Ca
ſtells.
THIS SCALE Conteyneth the Miles of the I
ſland, it
ſelfe, and is to be mea
ſured according the v
ſuall manner
PERFORMED BY IOHN SPEED
Anno. 1605

Holy Island, Garnsey, Farne Island, Iarsey

Angelsey [Wales]
Antiently called Mona. De
ſcribed 1608

Radnorshire [Wales]
The Countie of RADNOR described and the shyretownes sittuatione Anno 1608.
De
ſcribed by ChriStopher Saxon, Augmented and publi
ſhed by Iohn Speede Servant to his Maje
ſty.

Leinster [Ireland]
The Countie of LEINSTER with the Citie DUBLIN De
ſcribed

Ulster [Ireland]
The Province of ULSTER de
ſcribed

The Kingdome of Scotland
[including the]
Yles of Hebrides Caled of Pliny Haebudes, of Beda Meuaniae
[and the]
Yles of Orknay

Britain
As it was devided in the tyme of the Engh
ſhe
(?) Saxons e
ſpecially during their Heptarchy
{All images were spliced together from screencaps; click through to greatly enlarged versions}
The
John Speed proof maps (66 in total) were printed by Jodocus Hondius in Amsterdam. {Individual prints of the maps are available for
purchase from Cambridge University}
Mapping the origins of a masterpiece.
Map Forum biography of John Speed [
W].