[3] A collective tomb, discovered by accident in 2004, led to a number of excavations in the area of the present town which have yielded evidence of a large settlement with layers of occupation and significant finds of trade goods, bitumen, ceramics and glass as well as coins.
Three copper alloy tetradrachms were found at the site which, as well as pottery finds, link it to the Hellenistic period at the major pre-Islamic cities of Mleiha and Ed-Dur, while Roman amphorae, ceramics and glass attest to a continuity of not only occupation but a lively regional trade.
[3] Finds at the site attest to trade links with Bahrain, north-eastern Arabia, Iran, Mesopotamia and India, while amphorae, terra sigillata, glass and intaglios demonstrate connections between Dibba and the Roman Empire - two intaglios found in the town were engraved with figures of Perseus and Medusa (similar to one found in southern Thailand), further suggesting an extensive pre-Islamic trade network stretching far to the East.
Dibba (Debe) appears in the list of southeast Arabian placenames preserved by the Venetian jeweler Gasparo Balbi in CE 1580 and depictions of its Portuguese fort can be found in several sources, such as Armando Cortesão's Portugaliae Monumenta Cartographica.
In 1623, Safavids sent troops to Dibba, Khor Fakkan and other ports on the south-east coast of Arabia in order to prepare for a Portuguese counter-attack, following their expulsion from Hormuz (Jarun).
Two years later the Portuguese proposed moving part of the Mandaean population of southern Iraq to Dibba under pressure from neighboring Arab tribes.
Claes Speelman, the captain of the Zeemeeuw, made drawings in his logbook, including what is certainly the earliest depiction of Dibba in a European source.
[10] On 31 March 2009, Gulfnews reported that the UAE's National Centre of Metrology and Seismology (NCMS) recorded two earth tremors, measuring magnitudes of 2.9 and 3.5 on the Richter scale, which shook the Gulf of Aden and the north of Dibba at 6.21 am and 9.35 am.
[16] There is evidence of extensive ancient settlement[17] and Dibba was an international market on the coast of Oman frequented by merchants from India and China sailing through the Arabian Sea.