The Siddham block contains characters used in the Siddham script, which was historically used for writing Sanskrit and Buddhist texts in East Asia. The script is an abugida, with each consonant carrying an inherent vowel sound that can be modified with diacritics. The Siddham script was used from the 6th to the 12th centuries CE, particularly in Japan and China, where it was employed in the copying of sacred texts and mantras. This block includes all the characters needed to write in Siddham, reflecting its importance in the religious and cultural traditions of East Asian Buddhism..