that the city's inhabitants were to participate in the annual festival to their goddess Artemis. A small party of Roman soldiers approached the city under the cover of night and managed to scale the walls to get into the outer city and with reinforcements soon took control, killing Archimedes in the process, but the main fortress remained firm. After an eight-month siege and with parleys in progress, an Iberian captain named Moeriscus is believed to have let the Romans in near the Fountains of Arethusa. On the agreed signal, during a diversionary attack, he opened the gate. After setting guards on the houses of the pro-Roman faction, Marcellus gave Syracuse to plunder. Imperial Roman and Byzantine period Though declining slowly through the years, Syracuse maintained the status of capital of the Roman government of Sicily and seat of the praetor. It remained an important port for trade between the Eastern and the Western parts of the Empire. Christianity spread in the city through the efforts of Paul of Tarsus and Saint Marziano, the first bishop of the city, who made it one of the main centres of proselytism in the West. In the age of Christian persecutions massive catacombs were carved, whose size is second only to those of Rome. After a period of Vandal rule, 469–477, Syracuse and the island was recovered for Roman rule under Odoacer, 476–491 and Theodoric the Great, 491–526, by Belisarius for the Byzantine Empire (31 December 535). From 663 to 668 Syracuse was the seat of the Greek-speaking Emperor Constans II, as well as a capital of the Byzantine (Eastern Roman) Empire and metropolis of the whole Sicilian Church. Constans II was assassinated when his plans to permanently replace the Byzantine capital of Constantinople with Syracuse became suspected. Emirate of Sicily The city was besieged by the Aghlabids for almost a year in 827–828, but Byzantine reinforcements prevented its fall. It remained the center of Byzantine resistance to the gradual Muslim conquest of Sicily until it fell to the Aghlabids after another siege on 20/21 May 878. During the two centuries of Muslim rule, the capital of the Emirate of Sicily was moved from Syracuse to Palermo. The cathedral was converted into a mosque and the quarter on the Ortygia island was gradually rebuilt along Islamic styles. The city, nevertheless, maintained important trade relationships, and housed a relatively flourishing cultural and artistic life: several