In Titus 3:12, where had Paul decided to spend the winter?

Answer: Nicopolis

Paul told Titus to make every effort to come to him at Nicopolis, because he had decided to winter there.

“As soon as I send Artemas or Tychicus to you, make every effort to come to me at Nicopolis, because I have decided to winter there.”— Titus 3:12 (BSB)