Which monument by Maya Lin can be simultaneously called a work of Minimalist sculpture and a site-specific installation?

Which musical composition uses retrograde as a means of direct musical representation in its text?

a) Douce dame jolie b) Ma fin est mon commencement c) Tout par compas d) Je puis trop bien

Who designed the colonnaded piazza added to St. Peter's Basilica?

A) ?Bramante B) ?Borromini C) ?Bernini D) ?Maderno.