Constantine was Roman consul for the seventh time in 326. The "Consularia Constantinopolitana" says that in around March 326, Constantine executed his oldest son, the "caesar" Crispus. The "Calendar of Philocalus" says that on 18 July 326 (or the 21 July) Constantine again came to Rome. When he came to the city there was another ceremony. Jerome wrote that on 25 July 326, it was Constantine's twentieth anniversary festival as emperor (his ) in Rome. (326 was the second year in which Constantine had a festival for the same twentieth anniversary.) Jerome's "Chronicle" and the "Chronicon Paschale" both say that Constantine set up the city of Helenopolis on 7 January 327. Constantine was consul for the eighth time in 329. The year was the last time Constantine was consul. The "Consularia Constantinopolitana" says that on 11 May 330, Constantine was in Byzantium. On that day, Constantine dedicated again the city. After that, Byzantium had the name Constantinople (; ).