Complex sentence: An empty space of approximately was left between the outer walls and the shelves to allow for air circulation, intending to prevent the library from becoming overly humid in the warm climate of Anatolia, an early attempt at library preservation.
Split into simpler sentences: An empty space was left between the outer walls and the shelves to allow for air circulation. This was intended to prevent the library from becoming overly humid in the warm climate of Anatolia and can be seen as an early attempt at library preservation.