Iniciated in 1660 under Sergeant-Major Manuel de Sousa de Castro and the military engineer Pedro de Santa Colomba. Alcoutim was fully surrounded by walls, becoming a genuine Garrison. The walls  were pierced by the following gates: Gate of Tavira, Gate of Mértola and Gate of the River.

Stairs built by military engineers during the second half of the seventeenth century and beginning of the eighteenth century, with a view to connecting the church to the town.

Circular staircase from the Baroque Age, composed of landing and two subsequent and opposed flights of stairs.

The construction of Alcoutim’s Castle began during the rule of Dom Dinis, in the fourteenth century, in order to defend the border and control the trade on the river Guadiana.

In the sixteenth century, the pointed arch gate on the side facing the river was erected and several edifications adjoining the North Wall were built. In the second half of the seventeenth century and eighteenth century, military engineers built a platform on this castle to hold a gun battery of seven canons aimed at the town of Sanlucar de Guadiana.

In 1992/1993, the Municipality of Alcoutim developed a project to rehabilitate the Castle, which resulted in the find of a few archaeological remains. These remains were researched and duly regarded with the creation of the Museological Exhibition on Archaeology in 2000. In 2005, the gunpowder magazine held the exhibition Timeless Games – Exhibition of Trays and Game Pieces from the Old Castle of Alcoutim.

This building already stood in mid-sixteenth century, and must have undergone some architectural transformations and renovations by military engineers. It possesses a rigorous, simple and functional architecture, with a lateral facade facing the river and a main facade to the north.

It is found on three drawings of Alcoutim’s Square made by José de Sande Vasconcelos in the late eighteenth century. On one of these records the building is designated as “Houses of the Judge of Customs”.

In the twentieth century, it was the Costums Officers Station. It was unoccupied until recently rehabilitated in order to house the Tax Revenue Office of Alcoutim.

Medieval building that underwent some architectural transformations by military engineers during the seventeenth and eighteenth centuries.

The Residence of the Counts has a simple architecture: the singularity of this building is due to the double access stairs that interrupt the public path. Inside there is a small yard where an attractive well can be found.

Former Residence of the Counts of Alcoutim that was renovated in 1997/1998 by the Town Hall so as to house the Municipal Library, and the temporary exhibition hall.

The date of construction is unknown but the proximity of this temple to the Residence of the Counts, as well as the fact that the title of Count was granted on the Name Day of Saint Anthony, June 13th, suggest the possibility that this chapel was built at the end of the sixteenth century and beginning of the eighteenth century, by the Counts of Alcoutim as a private temple. The patron saint, Saint Anthony, suggests that this edification is associated to fishing in the Guadiana.

The interior holds an altar in masonry and a niche tiled in red adobe with the statue of Saint Anthony. Notice the tiled barrel vaulting and the highly accomplished lintel over the portal. In 2008, it welcomed the renovated Museological Exhibition of Sacred Art.