Gustav Heinrich Ralph von Koenigswald was a German-Dutch paleontologist and geologist who conducted research on hominins, including Homo erectus. His discoveries and studies of hominid fossils in Java and his studies of other important fossils of south-eastern Asia firmly established his reputation as one of the leading figures of 20th-century paleo-anthropology.

Mojokerto is a city in East Java Province of Indonesia. It is located 40 km southwest of Surabaya, the provincial capital, and constitutes one of the component units of the Surabaya metropolitan area which comprises Gresik Regency, Bangkalan Regency, Mojokerto Regency, Mojokerto City, Surabaya City, Sidoarjo Regency, and Lamongan Regency. The city covers an area of 20.21 km2, and had a population of 120,196 at the 2010 census and 132,434 at the 2020 Census; the official estimate as of mid-2023 was 141,785.