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In Tarsus, one of the most important cities of the Cilician Region, a monumental arch belonging to a bridge was found during an excavation carried out in 2007. The form of the arch was evaluated as a segmental arch by its excavators and the date of the structure was suggested as 1st century CE. On the other hand, because of the intricate structuring particularly on the upstream façade of the construction, some parts pertaining to the bridge were overlooked, and both the evaluation of the arch form and its dating were done based upon insufficient findings. Therefore, in this article, it is aimed to re-evaluate and clarify the construction date of the bridge based on the newly identified features. When viewed from the downstream façade of the bridge, which extends in the east-west direction, the monumental arch gives the impression of sitting on flat piers formed by 5-6 courses of stone blocks and raised. On the upstream façade, a restricted part of the arch, especially on the east side, can be seen. On this façade, it is observed that the bridge arch is not placed on a pier and continues in the east direction from the pier. Moreover, on the same façade, it it is obvious that the bridge pier, which causes an incorrect evaluation of the arch form, ends in the vault before reaching the archivolt. Therefore, it can be suggested that the piers in question may have been added to the vaults of the building in a later phase. Due to the newly detected features on the upstream façade of the bridge, it is understood that the bridge arch primarily reflects the threecentered arch form, not the segment arch. It is known that this form is not used in Roman bridge architecture. The result of analogical studies show that the most similar form stands in Rhodes. The vaulted structure in Rhodes covers a drainage channel rather than a bridge, and the Hellenistic period is suggested for the construction date. In addition, the remarkable features are that the diagonal arch stones of the Tarsus Bridge are connected with iron clamps and mortar is not used. As a result it has been possible to make some determinations in the context of architectural features and construction techniques of the Tarsus Bridge: It has been concluded that the features of the building point to the Hellenistic period. Furthermore it is aimed in this article to base the proposed dating on solid evidence and in order to determine the construction date of the bridge based on the findings, the history of the Hellenistic Period of Tarsus is examined. In the Hellenistic period, some political arrangements were made in Tarsus along with the other cities of the region, especially by the Seleucids. Evaluations for both the historical context and analogy as well as the architectural features of the structure in question confirms that the bridge may have built in the 2nd century BCE. [ABSTRACT FROM AUTHOR]