Millares Discoveries 1671. Diary of an Imaginary and Baroque Archaeological Excavation is a portfolio of twelve silkscreens created in 1971, the last work that Millares completed before his death. It was published by the Museum of Spanish Abstract Art in Cuenca under the direction of Fernando Zóbel and printed by Abel Martín. The edition consisted of 65 numbered copies, 10 for the artist and 10 dedicated to collaborators. The copy held by the museum, only signed and unnumbered, is one of these proofs intended for collaborators, which could have reached Sempere or Abel Martín. Millares did not manage to sign the complete edition: he died before doing so.

On Guarro watercolor fiber paper, in each of these silkscreens Millares deploys a universe of writing and sign that oscillates between graffiti and baroque arabesque. Although he was always fascinated by sign and script, around 1970 Millares incorporates frenetic invented writings in his works, developing a strange calligraphy: strikethroughs, dripping, signs, white spaces, lines and traces. With Chinese ink and smoke gray watercolor, he draws on these papers letting his agile pen fly free, writing words, sentences, paragraphs that recall seventeenth-century calligraphy, but in which nothing can be understood and even less, the rational sense of the message.

The title of the series refers to Millares' passion for archaeology and a tribute to Cuenca, a city to which the Spanish abstract generation professed a special devotion. The portfolio is one of the most complete and refined testimonies of his immense knowledge as a draftsman and the wisdom of his graphic work.