[1] Its official name is Gereja Santa Maria Diangkat ke Surga, derived from the original name in Dutch, De Kerk van Onze Lieve Vrouwe ten Hemelopneming (English: The Church of Our Lady of the Assumption).

[3] "De Kerk van Onze Lieve Vrowe ten Hemelopneming - The Church of Our Lady of the Assumption" was blessed and inaugurated by Mgr Edmundus Sybrandus Luypen, SJ on 21 April 1901.

Besides, there is a large round stained glass Rozeta Rosa Mystica, which is the symbol of Mother Mary.

[1] There are three main spires in Jakarta Cathedral: the two tallest ones measured 60 metres tall and are located in front on each side of the portal.

The third spire rises above the roof's cross intersection and measured 45 metres tall from the ground, and is called "The Angelus Dei Tower".

Originally, the second floor used to be the place for the choir during masses, but since the cathedral is quite old, there is concern that the building cannot support the weight of too many people upstairs.

Today, the upper floor functions as the Jakarta Cathedral Museum, housing the relics of Catholic rituals, such as the silver cups, hats and robes of the Dutch East Indies and Indonesian archbishops and cardinals.

[1] On the southern side, there is a statue of Pietà, describing the sadness of Mother Mary while holding the body of Jesus Christ after the crucifixion.

On the southern side, there is a large neo-Gothic style organ made in Verschueren, Belgium, then moved and installed in Jakarta in 1988.

[1] The body of the building was made of thick red bricks covered with plaster and applied with patterns to mimic natural stone construction.

Iron and wood are not suitable as typical neo-Gothic architecture materials usually employ stone masonry.

On an elevated platform in the south transept sits an organ made by George Verschueren of Tongeren, Belgium, built in 1988.