Dictionarium quatuor linguarum (The Dictionary of Four Languages) is a 16th-century book by the German polymath Hieronymus Megiser that includes a multilingual dictionary and a multilingual grammar of Italian, Slovene, German, and Latin. It also includes some Croatian words. It was compiled and published in 1592 in Graz (Austria), then part of the Habsburg Monarchy. The dictionary is the first multilingual dictionary of Slovene. The appendix, named Exempla aliquot declinationum et coniugationium (Some examples of declensions and conjugations) contains some grammar of the included languages and has been recognised as the second grammar of Slovene and the first multilingual grammar that includes Slovene. The book marks the beginning of Slovene lexicography. An extended edition was published