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According to some authorities, it was in Alaeddin's time, and by his advice, that the Ottomans ceased acting like vassals to the Seljuk ruler: they no longer stamped money with his image or used his name in public prayers. These changes are attributed by others to Osman himself, but the vast majority of the oriental writers concur in attributing to Alaeddin the introduction of laws respecting the costume of the various subjects of the empire, and the creation and funding of a standing army of regular troops. It was by his advice and that of a contemporary Turkish statesman that the celebrated corps of Janissaries was formed, an institution which European writers erroneously[citation needed] fix at a later date, and ascribe to Murad I.[1]