Euphrasian Basilica in the context of "Baptistery"

An apostle (/əˈpɒsəl/), in its literal sense, is an emissary. The word is derived from Ancient Greek ἀπόστολος (apóstolos), literally "one who is sent off", itself derived from the verb ἀποστέλλειν (apostéllein), "to send off". The purpose of such sending off is usually to convey a message, and thus "messenger" is a common alternative translation; other common translations include "ambassador" and "envoy". The term in Ancient Greek also has other related meanings.

In Christianity, the term was used in the New Testament for Jesus' Twelve Apostles (including Peter, James, and John), as well as a wider group of early Christian figures, including Paul, Barnabas, and Junia. The term is also used to designate an important missionary of Christianity to a region or a group, e.g. Patrick, the apostle of Ireland, or Boniface, the "apostle of the Germans". Some other religions use the term for comparable figures in their history. The word in this sense may be used metaphorically in various contexts, but is mostly found used specifically for early associates of the founder of a religion, who were important in spreading their teachings. The term is also used to refer to someone who is a strong supporter of something.

Poreč (pronounced [ˈpɔrɛtʃ]; Italian: Parenzo; known also by several alternative names) is a town and municipality on the western coast of the Istrian peninsula, in Istria County, west Croatia. Its major landmark is the 6th-century Euphrasian Basilica, which was designated a UNESCO World Heritage Site in 1997.

The town is almost 2,000 years old, and is set around a harbour protected from the sea by the small island of Sveti Nikola. Its population of approximately 12,000 resides mostly on the outskirts, while the wider Poreč area has a population of approximately 16,600 inhabitants. The municipal area covers 142 square kilometres (55 sq mi), with the 37 kilometres (23 miles) long shoreline stretching from the Mirna River near Novigrad (Cittanova) to Funtana (Fontane) and Vrsar (Orsera) in the south.