Hashish, also referred to as hash, is a cannabis concentrate typically inhaled or smoked. Hashish is created using a few different methods. However, the essential steps are removing the trichome glands from a cannabis plant and repeatedly compressing them to form a hardened, solid piece. It’s arguably one of the oldest types of cannabis concentrates, with written texts referring to hashish dating as far back as the 12th and 13th centuries. The varying look and feel of hashish are closely tied to its history and the method used to make it.