Volume 5 of the National Gallery of Art's biennial conservation research journal Facture explores issues associated with the conservation and technical analysis of modern and contemporary art. Focusing on works in a variety of media by celebrated artists such as Edward Steichen (1879-1973), Mark Rothko (1903-1970), Jules Olitski (1922-2007), and Jasper Johns (b. 1930), this publication's seven essays offer expertise from conservators, scientists, and art historians, yielding exceptional insights into extraordinary works of art. As in all issues of Facture, the peer-reviewed essays, enlivened with spectacularly detailed photography, navigate interdisciplinary boundaries to examine artworks from technical, scientific, and art-historical perspectives. In this issue, the dialogue is further expanded to include contributions from artists, their families, and their foundations.