He placed the cross in Constantinople at first, and took it back to Jerusalem on 21 March 630.[20] Some scholars disagree with this narrative, Professor Constantin Zuckerman going as far as to suggest that the True Cross was actually lost by the Persians, and that the wood contained in the allegedly still sealed reliquary brought to Jerusalem by Heraclius in 629 was a fake. In his analysis, the hoax was designed to serve the political purposes of both Heraclius and his former foe, recently turned ally and co-father-in-law, Persian general and soon-to-become king Shahrbaraz.[21]