Dezeen Magazine

Monastery of Leça de Balio extension by Álvaro Siza

Álvaro Siza adds angular concrete extension to renovated monastery in Porto

Portuguese architect Álvaro Siza has added an angular white-concrete extension to the Monastery of Leça do Balio in Porto to provide "a new landmark" for the site.

Designed by Siza with landscape architect Sidonio Pardal, the extension provides additional space for visitors to the site, which is the headquarters of the cultural entity Foundation Livraria Lello.

View from above of Monastery of Leça de Balio extension in Porto
Siza has added an angular concrete extension to a monastery in Porto

"The addition wants to adjust to the history and actual atmosphere of the monastery without the pretence of innovative arrogance," Pritzker Prize-winner Siza told Dezeen.

"The white concrete used in the chapel reflects its position of great autonomy," he added.

Exterior view of concrete annexe by Álvaro Siza
The extension is enclosed by four walls

The 399-square-metre extension is enclosed by four concrete walls, containing a geometric building and a spacious gravel courtyard.

Rising above the border walls, a pair of towers measuring 12 and 14 metres in height mark out the extension.

View of sculpture at Monastery of Leça de Balio extension
A concrete sculpture by Siza sits in the courtyard

The main building is formed of two angled, symmetrical volumes, which rise at their fronts to form lightwells. A sheltered entrance sits between them, while additional doors are provided at their corners.

Inside, the extension features a stripped-back interior defined by exposed concrete walls, which are contrasted by wooden doors and gravel flooring that extends from the courtyard.

Openings punctured into the tower and roof draw light inside the extension to create a play of light and shadow across the interior.

In the courtyard, Siza has designed a 1.8-metre-tall concrete sculpture named Wayfarer. It is intended as a "poetic tribute to the pilgrim's inner journey", referencing the structure's proximity to Camino de Santiago – or Way of Saint James – which is a series of pilgrimages leading to the tomb of St James.

Monastery of Leça de Balio extension by Álvaro Siza
Towers extend above the border walls

"I was asked to design a building project that would highlight the importance of Leça do Balio in the Way of Saint James," Siza said.

"A new landmark in the building that occupies part of a geometric garden belonging to the monastery and has a connection with the church itself."

Interior view of monastery annexe by Álvaro Siza
Roof openings draw light into the interior

Accompanying the extension was the transformation of an existing on-site residence into a cultural venue, led by Foundation Livraria Lello.

Connected to Siza's extension by gravel paths, the on-site residence functions as a "multipurpose nucleus" and cafeteria for the local community, and has been updated with new window frames, wooden doors and granite details.

Other recent projects by Pritzker prize-winning architect Siza include an angular expansion to the Serralves Museum and a ceramic mural for a rustic restaurant interior.

The photography is by Alexandre Delmar.

More images and plans

Site plan of Monastery of Leça de Balio
Plan
Section of Monastery of Leça de Balio
Section
Elevation of Monastery of Leça de Balio
Elevation
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio extension by Álvaro Siza
Monastery of Leça de Balio renovation
Monastery of Leça de Balio renovation
Monastery of Leça de Balio renovation
Monastery of Leça de Balio renovation
Monastery of Leça de Balio renovation