Christ crucified, closer. Note the sun and moon on either side, a habitual addition since the 6th-7th century.
A viewer informed me on some of the texts: surrounding Jezus: "Jezus Christus - The crucifixion". Under the beam to the right "He then said to his mother: See they Son" - "Mother of God" - "Lonchinos". Under thee left beam "Here see your mother" - John - "Aisopos" (name of the famous writers of animal fables - his name is like the word "(h)yssopos", which refers to the hysop stalk he raises in his hand.