12th century

The 12th century was defined by the calendar of Earth as occurring from the year 1101 through the year 1200.
==Events==
* The spheres are constructed by the Sphere-Builders. ()
* Vissians were said (in 2153) to have developed warp capability "nearly a thousand years ago", placing it at some point after 1153. ()
* The events surrounding Robin Hood take place in England. ()
* Trill Commissioner Vos noted that in the two-thousand years prior to 3189 (since approximately 1189), there had never been a successful instance of a symbiont joining with a non-Trill species. ()
== Appendices ==
=== Background information ===
* According to the Star Trek: Star Charts (p. 52) and the Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Andoria became warp-capable in 1154.
* Genghis Khan is born in c. 1162. ()
* Cambridge University is founded in Great Britain. ()
* The Second and Third Crusades were fought on Earth during this century. 
=== External links ===
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