The material selection and production .

1. The materials used in the Villa Savoye is prosaic materials; such materials were used during this time in building houses for lower-class Parisians. Although the house is designed for the affluent, plaster walls and iron handraills are used.

(http://en.wikiarquitectura.com/index.php?title=Villa_Savoye#Materials)

2.PETER ZUMTHOR's THERMAL BATHS. VAL. in SWITZERLAND.

The building is made from local Valser quartzite and concrete. Water, light and to some extent steam and heat, add to the definition of areas within the ritual of the bath.

(http://www.galinsky.com/buildings/baths/)