In 1867, the area of Metsovo temporarily became a kaza.
The kaza was an administrative subdivision of a sanjak and can be understood to be province. Originally it indicated an area under the power of a kadı (Islamic judge). In 1864, however, the law on the vilayets dictated that the kaza was no longer subject to the hierarchy of Islamic judges. The administrative reform of the Ottoman state was completed in 1867 when the Ioannina and Trikala pashaliks become a single vilayet, the vilayet of Ioannina.