If we assume that there are no missing letters in the date, Presbyter Romanus died in 512 (550 year of the Spanish era, which started in 38 BC). But probably there is a lacuna and therefore we should suspect that Romanus died some time after 512. Hübner (1900, no. 311) read "δLX" (= 560 in the Spanish era, that is 522 AD). Vives (1942, no. 92) also suggested that the lacuna "XV ka[...]s" should be filled "XV Kalendas Maias".