sentences:  The name "Tarnów" comes from an early Slavic word "trn/tarn", which means "thorn", or an area covered by thorny plants.Already in the mid-9th century, on the Tarnów's St. Martin Mount (Góra sw. Marcina, 2.5 kilometers from the centre of today's city), a Slavic gord was established, probably by the Vistulans.Due to efforts of local archaeologists, we know that the size of the gord was almost 16 hectares, and it was surrounded by a rampart.