30
. See, e.g., refs. and trans. of Bacon’s31
. Arnold of Lübeck, ‘De conversione Livonie’,32
. PL, 215, cols. 428–30.33
. Christiansen,34
. For Livonia, W. Urban,35
. For Livonia after 1300, W. Urban,36
. Apart from the general surveys, see T. Lindkvist, ‘Crusades and Crusading Ideology in the Political History of Sweden’,37
. PL, 200, cols. 860–61.38
. Henry of Livonia,39
. Christiansen,40
. See note 39 and ibid., pp. 177–98.41
. For refs. to the42
. W. Urban,43
. Gregory IX,44
.45
. See, apart from the general works cited, M. Burleigh, ‘The Military Orders in the Baltic’,46
. E. N. Johnson, ‘The German Crusade in the Baltic’,47
.48
. Voigt,49
. Alexander IV,50
. In general, Urban,51
. Bruno of Olmütz’s52
.53
. In general, W. Paravicini,54
. G. Chaucer,55
. For what follows, Tyerman,56
.57
.58
. J. Capgrave,59
. Tyerman,60
.61
. For these commercial aspects, Tyerman,62
. In general, Christiansen,63
. See the discussion, Christiansen,22: Survival and Decline: the Frankish Holy Land in the Thirteenth Century
1
. In general, Holt,