Open Questions

Open Concrete

Why It Is Open Recent materials research has produced strong partial answers, including reactions between seawater and volcanic ash that grow reinforcing minerals in Roman marine concrete, and lime fragments that may reseal cracks as they open, but the full recipe and practice remain incompletely understood, translation of the findings into modern durable and low-carbon concretes is unfinished work, and the research groups involved continue to publish competing accounts of which mechanisms matter most.

What Would Settle It A validated account of the Roman mix and curing practice sufficient to reproduce its durability in modern test structures, monitored over decades rather than inferred from laboratory samples.

Expertise Needed Materials Science, Archaeology, Civil Engineering

Question posed in Encyclopedia Britannica, Concrete and Roman architecture articles; ancient concrete durability coverage.

Open Structural Steel

Why It Is Open The Home Insurance Building in Chicago (1885) is commonly named the first skyscraper for combining a full steel frame with height, but the claim is complicated: the Ditherington Flax Mill in England (1797) and Broad Street Station in Philadelphia (1881) used iron or steel framing earlier at a smaller scale, Chicago's own press did not call the building the first skyscraper at the time, and the title was not formalized until the building's 1985 centennial.

What Would Settle It A definition of skyscraper that historians apply consistently, by height, frame material and load bearing method, to every iron or steel framed candidate building before 1885, or a contemporaneous record naming one of them first under that definition.

Question posed in Home Insurance Building (Wikipedia), Disputes Over the First Claim section.

Open Cross-Laminated Timber

Why It Is Open A patent resembling cross-laminated timber was developed in the 1920s by Frank J. Walsh and Robert L. Watts in Tacoma, Washington, but many sources instead date the first CLT patent to 1985 in France, and the modern engineered product now used in mass-timber construction was developed independently in Austria through the 1990s.

What Would Settle It A verified copy of the 1920s Walsh and Watts patent compared directly against the 1985 French patent to establish whether the earlier filing actually describes cross laminated construction in the sense the modern product uses, or a different technique that later sources conflated with it.

Question posed in Cross-Laminated Timber (Wikipedia), History section.

Open Dome

Why It Is Open A dome is closely related to the cupola, and the terms overlap in use: cupola can mean a small dome-like structure crowning a roof or turret, or it can serve as a near-synonym for dome itself, so historians and reference works have not settled a single boundary between the two.

What Would Settle It A single technical definition distinguishing dome from cupola by a specific criterion, such as scale, structural role or position on the building, applied consistently across architectural historians and reference works.

Question posed in Dome (Wikipedia), Lead section, cupola overlap and definitional controversy.

Open Ornament and Crime

Why It Is Open Loos's polemic attacks applied, imitative ornament, carved or molded decoration added to a surface, while his built interiors, the Villa Muller in Prague among them, are finished throughout in costly veined stone and fine wood chosen expressly for their natural pattern and color. Some historians read this as fully consistent with his stated position, since the material itself is left plain and unworked rather than carved into applied decoration; others read it as the polemic's absolutism failing to survive contact with his own practice, arguing that a client experiencing a room sheathed in book-matched marble is having exactly the sensory, expensive, status-marking experience the essay claims to reject. Both readings appear in the architectural-history literature and neither has settled the question.

What Would Settle It A close comparison of Loos's own later writing about specific interiors against the built rooms themselves, room by room, testing whether he offers a consistent principle distinguishing plain natural material from ornament, or whether the distinction is asserted rather than argued.

Expertise Needed Architectural History, Design Theory

Question posed in Sir Banister Fletcher's A History of Architecture, Banister Fletcher, edited by Dan Cruickshank (20th edition), Sections on Adolf Loos and the modern movement's origins.

Open The Parti

Why It Is Open The word parti traces to 15th century French parti pris (decision taken), and producing a quick esquisse of the parti was central to training at the Ecole des Beaux-Arts de Paris during the 19th and early 20th centuries, per Wikipedia's own Parti (architecture) article; neither the coinage nor the pedagogy is dated to a specific year in that source, and a further web search surfaced no more precise dating.

What Would Settle It A history of Beaux-Arts pedagogy naming the year the esquisse/parti exercise was formalized in the atelier system, or an etymological source dating the architectural sense of parti pris more precisely than "15th century".

Expertise Needed Architectural history, historical linguistics

Question posed in Wikipedia, Parti (architecture), Etymology and History sections.

Open Deutsches Architekturmuseum

Why It Is Open Sources agree the museum building, a renovated 1912 villa in Frankfurt am Main, was rebuilt from 1979 to 1984 by architect Oswald Mathias Ungers and inaugurated in 1984, but do not state whether the museum as an institution, its founding board, collection and charter, was established earlier, when the renovation began in 1979, or exactly at the 1984 opening.

What Would Settle It A dated founding charter, or an institutional history published by the museum itself, distinguishing the institution own establishment from the building 1984 public opening.

Expertise Needed Institutional history, museum studies

Question posed in Deutsches Architekturmuseum (Wikipedia), Deutsches Architekturmuseum, German Wikipedia, construction and opening section.

Open Irwin S. Chanin School of Architecture

Why It Is Open The atlas's own citation (Cooper Union, Wikipedia, "Irwin S. Chanin School of Architecture" section) names John Hejduk as having established the program but gives no year; cooper.edu/architecture/about and cooper.edu/architecture/archive, fetched live, also name no year, and the one page found naming a specific process (archives.cooper.edu) returned HTTP 403 to both a direct fetch and WebFetch.

What Would Settle It A dated Cooper Union institutional record, course catalog, board minute, or a published history of the school naming the year the architecture curriculum became its own school separate from the School of Art and Architecture.

Expertise Needed Institutional and architectural history

Question posed in Irwin S. Chanin School of Architecture (Wikipedia), Cooper Union, "Irwin S. Chanin School of Architecture" section.

Open Imhotep

Why It Is Open Imhotep was deified by later Egyptians as a god of medicine and wisdom, and his name is recorded on statue-base inscriptions of the pharaoh Djoser, but despite extensive archaeological search at Saqqara, most notably by Walter Bryan Emery in the mid twentieth century, his own burial place has never been positively identified.

What Would Settle It Discovery and secure identification of an intact or inscribed burial context naming Imhotep, most likely somewhere in the Saqqara necropolis, where later pilgrims left votive offerings and animal mummies dedicated to him without ever marking the tomb itself.

Expertise Needed Egyptology and field archaeology

Question posed in Encyclopedia Britannica, Imhotep, legacy and later tradition section.

Open Florence Cathedral

Why It Is Open Brunelleschi left no treatise and guarded his methods in his own lifetime, so the surviving evidence is the dome itself, the account books, and machines described secondhand. How the herringbone brickwork and the double shell actually stabilized each fresh course of the rising vault, and how the courses were laid out in space without centering to guide them, is still argued among historians of construction, with competing geometric reconstructions defended in the literature and none established.

What Would Settle It A reconstruction of the laying-out method that accounts for the dome as measured, the documented equipment and the account-book record together, tested at scale rather than argued from drawings alone.

Expertise Needed Construction History, Structural Engineering, Archival Research

Question posed in Encyclopedia Britannica, Florence Cathedral and Brunelleschi articles; dome construction sections.