Ioannes III Dukas, Emperor in
Nicea (1192-1254)
son of Basileios Batatzes and NN Angelina
Born circa 1192
Died 3 November 1254 Nymphaion
Married 1244
Costanza 'Anna' von Hohenstaufen
Born circa 1230 1232
Died April 1307 (1313 ?) Valencia, Spain
Said to have suffered from epilepsy, about 1212 he married Eirene Dukaina
Komnene Laskarina, daughter of Emperor Theodoros Laskaris.
Early in 1222 she gave birth to a son, but later that year had a fall
from her horse and from then on was unable to have any more children. Also
in 1222, at the age of about thirty, he became Emperor in Nicea and, in
1225, recovered most of the Byzantine Empire. His wife, as Sister Eugenia,
went to live in a convent where she died in the summer of 1239. In 1244
he married Costanza von Hohenstaufen, illegitimate daughter of Emperor
Friedrich II, who had been the mistress of Emperor Michael VIII. However,
no more children were born.
Source: Leo van de Pas
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