Following the First Council of Nicaea in the year 325, Archaeologists in Turkey suspect that a basilica must have been built which is underwater now. Now it is a 1,600- year old basilica. The remains of a 1,600-year-old Byzantine basilica have been discovered at the site of the Councils of Nicaea, at the bottom of a lake in northwest Turkey.
According to Sahin, the church was most likely built in the 4th century, in honor of St. Neophytos who was martyred during the time of Roman emperor Diocletian in 303.
Neophytos had travelled to Nicaea (now modern-day northwest Turkey) to denounce the pagan faith during the Diocletian persecution. The basilica was built on the spot where he was killed by Roman soldiers in a most brutal manner:
The enraged persecutors suspended the saint from a tree, they whipped him with ox thongs, and scraped his body with iron claws. Then they threw him into a red-hot oven, but the holy martyr remained unharmed, spending three days and three nights in it. The torturers, not knowing what else to do with him, decided to kill him. One of the pagans ran him through with a sword (some say it was a spear), and the saint departed to the Lord at the age of sixteen. – Orthodox Church of America
It is possible, according to Sahin, that the basilica was built as a result of the First Council of Nicaea, convened by Emperor Constantine the Great in the year 325.
“Most probably, it could have been built in 325 after the first council meeting in İznik. In any case, we think that the church was built in the 4th century or a further date. It is interesting that we have gravures from the Middle Ages depicting this killing. We see Neophytos being killed on the lake coast,” Sahin told Hurriyet News.
Archaeologists have determined that the basilica collapsed during an earthquake in 740 and was never rebuilt. The ruins were submerged over time by changes in the water level of the lake. The discovery of the basilica was named one of the Top 10 Discoveries of 2014 by the Archaeological Institute of America.
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