Trowulan is an archaeological site in Trowulan Subdistrict, Mojokerto Regency, in the Indonesian province of East Java. It includes approximately 100 square kilometres and has been theorized to be the site of the eponymous capital city of the Majapahit Empire, which is described by Mpu Prapanca in the 14th-century poem Nagarakretagama and in a 15th-century Chinese source. When it was the capital of the Majapahit Empire, the city was known as Wilwatikta, which is a name also synonymous with the empire's name. It was razed during the invasion of Girindrawardhana to defeat Kertabhumi in 1478. After this event Majapahit's capital was moved to Daha (Kediri). The Trowulan Museum includes a collection of artifacts.

Mojokerto Regency is a regency in East Java Province of Indonesia. It is part of the Surabaya metropolitan area which comprises Gresik Regency, Bangkalan Regency, Mojokerto Regency, Mojokerto City, Surabaya City, Sidoarjo Regency, and Lamongan Regency. The Regency covers an area of 969.36 km2. The population of the Regency was 908,004 in 2000, but had risen to 1,025,443 at the 2010 Census and to 1,119,209 at the 2020 Census; the official estimate as of mid-2022 was 1,133,584, and the total for mid-2023 was 1,145,400. Many of them earn their living as small farmers and craftsmen.