The inscription from Mesas do Castelinho, south Portugal, was discovered in September 2008. With 82 readable signs it is now the longest of the corpus of 95 Tartessian inscriptions. These texts survive from the Early Iron Age in the south-western Iberian Peninsula, the earliest writing from Atlantic Europe. By recombining word roots, prefixes and endings previously attested, the new inscription permits a major breakthrough with the language, confirming word divisions and contributing to the critical mass of evidence. It is now possible to take the case for Tartessian as an Indo-European and specifically Celtic language a step further, to ask what sort of Celtic language Tartessian was and how its syntax and sound system compares with those of Celtiberian, Gaulish, Old Irish and Welsh.

The most comprehensive reference resource on Celtic culture; an encyclopedia written by and for scholars, yet accessible to all. This encyclopedia covers the entirety of the Celtic world, both through time and across geography. Although emphasizing the areas where Celtic languages and traditions survive into the present, the work does not slight the reaches of the Celtic empire, which was the largest language and cultural group on earth prior to the rise of Rome. In some 1,500 articles, many representing original research by the finest Celtic scholars, the work covers the Celts from prehistory to the present, giving comprehensive treatment to all topics from myth to music, religion to rulers, literature to language, government to games, and all topics in between. Entry into the rich world of Celtic scholarship has been difficult: The available information must be teased out of dense scholarly tomes or lightweight books emphasizing such popular elements of Celtic tradition as wee people, Druids, and blue-painted pagans. While this work treats those topics within its broad scope, the information is presented as scholarship, without the pop patina.