Saints Cyprian and Justina of Antioch
The names of the saints are inscribed in Greek above their portraits. Justina carries the hand cross that denotes a martyr in Orthodox iconography. The cabinet behind them with the scrolls and pitchers may represent the tools of Cyprian's former profession as a pagan magician.
As for provenance, the Wikimedia page for this icon says, "Found in random Romanian Churches' interior walls."
Read more about images of SS. Cyprian and Justina.
Source: this page at Wikimedia Commons.