This unusual wrought iron and rock crystal sconce takes the form of Lanvin's signature butterfly motif and seems a steal at $15,000-20,000. From the provenance it appears that the sconce was installed in Lanvin's country house outside Paris and comes directly from her descendants, very cool. There is also a typically Rateau carved wood mirror with a grape motif bearing the same provenance. For a serious Rateau collector these museum quality masterworks have the added bonus of being from his #1 client and never before being on the market. Perfection!