Alexandria and elsewhere. They are clearly different from the Egyptian resident community on Delos as a whole. 51 We are relatively well informed of how the Roman community-the conventus civium Romanorum-was organized. It occupied a compound of considerable size, the so-called 'Agora of the Italians'. In the third quarter of the second century BC, collective action by the Roman residents' community was socially structured through boards of magistri: the Competaliastai, the Apolloniastai / Magistri Apollini, the Hermaistai / Magistri Mercurii and the Poseidoniastai / Magistri Neptuni. The relationship of these to the Roman conventus is not clear. The Competaliasts are all slaves. Their name links them to the collegia Competalicii known also in Italy as neighbourhood associations. 52 The three other boards, however, composed of freedmen and ingenui, were more prestigious. Korneman, Schulten and Boak interpreted them as the (chosen) representatives of the Roman-Italian community on Delos. 53 Hatzfeld, however, rejected this and noted the similarities with the collegia and magistri in Capua and identified them as semi-professional / semi-religious associations, whose implicit raison d'être was to defend commercial interests. 54 Flambard further underpinned this interpretation. He argued that the Magistri Mercurii represented the oldest Roman merchant association on Delos, established c. 150 BC. As the community grew two new collegia were created c. 125 BC: one of shippers, represented by the Magistri Neptuni and the 'Apollo-Worshippers', represented by the Magistri Apollini. The Competaliastai were established only towards the end of the second century BC. 55Hasenohr recently reasserted Kornemann's view. She believes that the magistri's (formal) duty was to preside over cult-activities and more generally to manage the 'Agora of the Italians'. She points to the absence of a reference to a collective body (such as collegium, synhodos) in the magistri inscriptions, to the often joint inscriptions by the boards and to the fact that family-members are found spread randomly over the Apolloniastai, Hermaistai and Poseidoniastai. 56 These arguments, however, carry little weight. Joint dedications by collegia 51