sentences:  During the 13th century Croatian vernacular texts began to appear, the most important among them being the "Istrian Land Survey" of 1275 and the "Vinodol Codex" of 1288, both written in the Chakavian dialect.The Shtokavian dialect literature, based almost exclusively on Chakavian original texts of religious provenance (missals, breviaries, prayer books) appeared almost a century later.The most important purely Shtokavian dialect vernacular text is the Vatican Croatian Prayer Book (ca.