Madrid, Rajab 22, 1437, Apr 29, 2016, SPA -- Workers discovered thousands of Roman coins at a construction site in the southern Spanish town of Tomares outside of Seville, local media reported Friday. The silver and bronze coins dating from the third and fourth centuries weighed around 600 kilograms and are of inestimable value, according to Ana Navarro, the director of the Archaeological Museum of Seville. The coins were found stored in 19 amphorae, a type of tall jar used by the ancient Romans and Greeks, dpa reported. --SPA 20:51 LOCAL TIME 17:51 GMT www.spa.gov.sa/w