He is assumed to be the one who completed the work on the Pisa Cathedral started by Buscheto.

The attribution is based on his own declaration left on the façade of the cathedral[1] that defined the Pisan Romanesque style.

Usually Rainaldo is thought to be an architect overseeing (in the 12th century) an extension of the nave by adding three bays consistent with the original style of Buscheto, enlarging the transept, and planning a new facade which was completed by workers under the direction of the sculptors Guglielmo and Biduino.

[4] In any case, work was finished in 1180, as documented by the date written on the bronze knockers made by Bonanno Pisano found on the main door.

[citation needed] Fedotova[5] credits Raynaldo with a dominating architectural composition of the new facade, with four levels of arches and pillars, dating this change 1150–1160.