What does public-domain status mean here?

It generally means that the represented source text is no longer protected by copyright in the applicable jurisdiction or has been released for public use. Status may vary by country and edition.

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Source-Based Editions in Art & Architecture - SOPIU Art & Architecture Library

SOPIU Art & Architecture Library: 97 Public-Domain Books and 114 Authors

The SOPIU Art & Architecture Library is a focused digital catalogue of 97 public-domain books, spanning art history, painting, sculpture, architecture, design, and photography. It includes studies of Italian painting, Gothic cathedrals, artistic technique, and cultural history, with authors like Wassily Kandinsky, Jane Ellen Harrison, and John C. Van Dyke. The collection is organized into four overlapping categories, and each record provides edition facts, keywords, and a reader's guide. Three suggested reading paths offer entry points—spiritual art, sacred architecture, and artist biographies. The catalogue is designed for practical exploration, connecting related works and encouraging unexpected connections across disciplines.