"Croatia Alba", or White Croatia, is referred to in the Latin "Chronicle of the Priest of Duklja", compiled no earlier than the 12th century. This work refers to White Croatia as the lower part of Dalmatia ("Croatia Alba, que et inferior Dalmatia dicitur"), as opposed to "Red Croatia", which refers to upper Dalmatia ("Croatia Rubea, que et superior Dalmatia dicitur"). According to 21st-century historian A. Mayorov, the territory of this "Croatia Alba" was the most developed and densely populated and formed the core of the emerging Croatian state.