The window of the House of the Chapter is one of the culminating points of Manuelin art in Portugal.

If you want to visit this house which was started to be built in 1510 by Diogo de Arruda, you must enter fom Charola of the Convent of Christ; it was here that the general courts, convoked by Filipe I of Portugal, had been congregated. At that time, this dependence wasn't the House of the Chapter but the sacristy of the church. The access to the current House of the Chapter is made by the south window, currently transformed in door.

The Museum of the Friends of the Order of Christ Monuments Union is installed in this building, where there is a vast collection of archaeological objects such as sculptures, paintings, a cinquecentist sword with engraved guards (notable), a fragment of a cinquecentist board, representing instruments of torture, perhaps proceeding from one of the Charola’s retable

Concerning the window itself, we can shimmer representative elements of the overseas contact, vegetalists, maritime and realistic suggestions and an evident epic sense.

All this gigantic composition, perhaps the most fabulous architectural creation of all times, seats on a bearded figure, almost an atlas, sculptured rudely in the rock, but of great vigour, giving the illusion of supporting the set. Among the several theories for the appearance of this figure, some indicate to be this personage a self-portrait of the architect Diogo de Arruda.