The Santiago Gate which is part of a fortress said to be "the oldest surviving European architectural remains in Southeast Asia and the Far East" according to Wikipedia.
The A’ Famosa Fortress, Malacca (Jalan Kota, 75000 Malacca, Malaysia) is located on St Paul’s Hill, near various historical site remains such as the Stadthuys and the St Paul’s Church. Together the buildings form part of the UNESCO World Heritage Site in Malacca.
In addition to St. Paul’s Church, Stadhuys and Jonker Street, another famous attraction in Malacca is A Famosa Fort also known as Porta De Santiago.