Whilst the exterior of the Igreja de São Francisco in Porto is a fine example of Gothic architecture it is the outstanding Baroque inner decoration for which this church is best known.
It is estimated that between 300 and 500 kg of gold were used on the exquisite gold-gilt wood carving which covers much of the church's interior. The majority of the intricate decor was added during the 18th century. As far as I can gather the level of opulence displayed did not sit that well with the conditions endured by the poor of Porto and the church was considered something of an embarrassment by many.