According to the notice next to the showcase these are the earliest representations of the Life of St. Francis. They are from the mid-thirteenth century. They are from the Church of the Akataleptos Monastery. I found a reference to this church on the net. The Monastery of Christ Akataleptos (the Incomprehensible Christ) is first mentioned in a document from the year 1094 and existed until the end of the Byzantine empire. For a long time, it was believed that the Kalenderhane mosque was the church of this monastery. However, this church is now securely identified as that of the monastery of the Mother of God Kyriotissa. The former Byzantine church known as Eski Imaret Camii, which was usually taken for that of Christ Pantepoptes (the All-Overlooking Christ), has only recently been identified with the church of the monastery of Christ Akataleptos.