The conventional wisdom among liberal theologians and higher critics of the Bible is that the deity of Christ was a concept that grew up out of a long oral tradition that gradually elevated the historical Jesus, culminating in the Council of Nicaea, which defined the doctrine in 325 A.D. But there are references to the deity of Christ long before Nicaea.
A mosaic table, apparently used for Holy Communion in a house church at Tel Megiddo (a.k.a. Armageddon), is going on display in Israel. First discovered in 2005 in the excavation of the earliest place of Christian worship that has been discovered, the table is dated 230 A.D. An inscription on the table reads, “The god-loving Akeptous has offered the table to God Jesus Christ as a memorial.” See the inscription and details about it in the article Ancient mosaic describing Jesus Christ as ‘God’ to be unveiled in Israel, which calls it “one of the earliest-known testaments to early Christian belief in the divinity of Christ.”