 Only fragmentary evidence survives concerning Theoktistos ' domestic policies . The Oxford Dictionary of Byzantium credits him with " continuing the sound fiscal policies of Theophilos " , leading to the accumulation of considerable monetary reserves in the imperial treasury , to the amount of 19 @,@ 000 pounds of gold and 30 @,@ 000 pounds of silver by 856 . He also promoted the career of Constantine @-@ Cyril , whom he first met ca . 842 , helping him to acquire a good education and later to find a post as chartophylax in the patriarchal library , after Constantine rejected an offer of becoming a provincial strategos . Theoktistos ' sponsorship of men like Constantine and Leo the Mathematician contributed to the revival of secular learning in Byzantium . Theoktistos was also engaged in building activity , erecting new structures in the <unk> near the Great Palace of Constantinople , installing a new iron door in the Chalke Gate , as well as sponsoring unspecified buildings in the Thracian suburbs of Constantinople , notably Selymbria . 
