 Ramba uchiverenga ndima ino - MuMiddle Ages guta racho raizivikanwa seTherma kana kuti Thermopolis uye raiwanzokwikwidzwa pakati peUmambo hweBulgaria neByzantium. Yakabatanidzwa muBulgaria muna 705 pamwe chete nenharaunda yeZagora, mushure mekunge yapihwa nemutongi weByzantine Justinian II kuna khan weBulgaria Tervel. Muna 921, panguva yehondo yeByzantine neBulgaria ya913-927Muna 43 C.E., vaByzantium vakatanga hondo yakasvika kuguta racho. Mukuru mukuru weByzantium Pothos Argyros akatumira boka revarwi kuti rinotarisira kufamba kwevaBulgaria, iro rakakandirwa ndokukundwa neuto reBulgaria. 