Pontianak is the capital of the Indonesian province of West Kalimantan, founded by Syarif Abdurrahman Alkadrie as a capital of Sultanate of Kadriyah on 23 October 1771 / 14 Rajab 1185 AH. Syarif Abdurrahman Alkadrie developed Pontianak as a trading port on the island of Borneo, occupying an area of 107.82 km² in the delta of the Kapuas River. It is located on the equator, hence it is widely known as Kota Khatulistiwa (Equatorial City). The city center is less than 3 kilometres (2 mi) south of the equator. Pontianak is the 26th largest city in Indonesia in terms of population, as well as the fifth largest city on the island of Borneo in terms of population after Samarinda, Banjarmasin, Kuching and Balikpapan.
Jami Mosque of Pontianak, also known as Sultan Syarif Abdurrahman Mosque, is the oldest mosque of Pontianak, in Kalimantan, Indonesia. The large wooden mosque, together with the royal palace of Kraton Kadriyah, was among the first buildings constructed in the city following the establishment of Pontianak in 1771.
The Equator monument is located on the equator in Pontianak, Indonesia. It marks the division between the northern and southern hemispheres. Its location is in Jalan Khatulistiwa, North Pontianak, about 3 kilometres from the city centre of Pontianak.