The first poetry written in what is now the Czech Republic dates back to the 9th century, when manuscripts containing hymns and devotional poems began to appear across Eastern Europe. This early Czech poetry was written in Old Church Slavic – a language developed by saints Methodius and Cyril as a way of fighting against Frankish (German) influence, although by the 11th century Latin had taken root. The first poems composed strictly in Czech, the Legends of King Wenceslas and Hospodine, pomiluj ny (Lord Have Mercy On Us), both date back to the 10th century. By the 13th and 14th centuries, Czech had become an accepted language for literature (kunstsprache), and scribes were composed in Czech at the courts of the Přemyslid kings. During this period, prose was rare in Europe, and even works such as scientific treatises, almanacs, and building manuals were generally written in verse. The Czech lands were no exception, and before prose began to take hold in around 1350 there was a great deal of Czech poetry written on every subject. Most popular were legends, epics, historical chronicles, theological tracts, biographies of saints (known as hagiography), and romances.