An ethnographic study documents and compares the construction, symbolism, and ritual placement of Katcina altars used in Hopi kiva ceremonies across four pueblos. It describes altar architecture, figurines, painted motifs, lightning and corn symbols, prayer sticks, tiponi badges, and other paraphernalia; connects these elements to seasonal rites such as the Powamu bean-planting and the Niman farewell observances; and notes village-to-village variation and limitations of knowledge due to restricted access. Plates and detailed descriptions support a morphological analysis intended to reveal the aims and ceremonial functions of these altars within Hopi religious practice.