Wall Labels for Four Seas

At noon today in Los Angeles, the Los Angeles County Museum of Art cuts the ribbon on the David Geffen Galleries, Peter Zumthor's two-decade, 275-meter concrete-and-glass bridge over Wilshire Boulevard. The building is an argument; so is the hang inside it. For the first time in the museum's history, the permanent collection has been arranged not by chronology and not by nation but by four bodies of water — "the Pacific, Indian, and Atlantic Oceans and the Mediterranean Sea," in the museum's phrasing, "as a framework for creating vital and surprising connections across time and place."[^1] Critics have been divided on the concrete and on the concept. I don't have an opinion on the interior design. What I have is a response to the premise. If the sea is the unit of art history, then each sea ought to have a wall label.

Pacific Ocean c. 190 Ma – present Saltwater; basalt ocean crust; subduction zones; trade winds. 165,250,000 km². Maximum depth 10,935 ± 6 m (Challenger Deep, southern Mariana Trench, 2021 measurement).[^2] Provenance: the oldest surviving ocean basin on Earth — a remnant of the superocean Panthalassa, its present floor grown from a Jurassic triple junction. The first peoples to cross its open distances were Austronesian: the Lapita cultural complex reached the Bismarck Archipelago c. 1300 BCE and Samoa c. 1000 BCE, carrying dentate-stamped pottery east along the trade winds. Condition notes: on 9 September 2025 the northeast Pacific recorded a mean surface temperature of 20.6 °C, the highest observed. A marine heatwave has been present somewhere in the basin in every year from 2019 through 2025. Cf. Gallery 3. See also: Panthalassa, exhibited in absentia.

Indian Ocean c. 180 Ma – present Saltwater; tropical crust; monsoon. 70,560,000 km², without marginal seas. Maximum depth 7,290 m (Sunda Trench). Provenance: opened with the breakup of Gondwana c. 180 Ma. The first long-distance open-ocean sail route on record relied on the reversal of the summer and winter monsoon; the passage from the Red Sea across to the Indian peninsula is described in the Periplus of the Erythraean Sea, a merchant's handbook written in Greek by an anonymous Egyptian author c. 40–55 CE. The wind itself was called Hippalus, after the pilot said in the first century BCE to have first "laid his course straight across the ocean."[^3] Condition notes: the fastest-warming tropical basin on Earth. Surface warming across much of the tropical Indian Ocean now outpaces the global mean. Cf. Gallery 6. See also: the monsoon, displayed seasonally.

Atlantic Ocean c. 201 Ma – present Saltwater; mid-ocean ridge; overturning circulation. 85,133,000 km². Maximum depth 8,376 m (Milwaukee Deep, Puerto Rico Trench). Provenance: opened at the Triassic–Jurassic boundary c. 201 Ma, during the eruption of the Central Atlantic Magmatic Province — one of the largest volcanic events in the geological record, contemporaneous with a mass extinction. Phoenician mariners founded Gadir (modern Cadiz) beyond the Strait of Gibraltar c. 1104 BCE, the oldest continuously inhabited city in western Europe; Carthaginian crews under Hanno are reported to have reached the West African coast in the sixth century BCE. Condition notes: the Atlantic Meridional Overturning Circulation — the conveyor that redistributes heat between hemispheres — has been measurably weakening since the early 2000s. A study published this month projects a decline of more than 50 percent by 2100, roughly 60 percent faster than the mean of climate models.[^4] Cf. Gallery 10. See also: the Gulf Stream, visible only in motion.

Mediterranean Sea c. 5.33 Ma – present, in present form Saltwater; evaporite basement; restricted exchange. 2,500,000 km². Maximum depth 5,109 ± 1 m (Calypso Deep, Hellenic Trench, 2020 direct measurement). Provenance: the basin in its current form dates from the Zanclean flood, when, c. 5.33 Ma, Atlantic water breached a dried-out basin left by the Messinian Salinity Crisis and refilled it — by some estimates, 90 percent of the Mediterranean returning in a window of months to two years, with sea level briefly rising faster than ten meters per day.[^5] The earliest direct evidence of seagoing navigation anywhere in the world comes from obsidian from the island of Melos, found at Franchthi Cave on the Greek mainland and dated to c. 13,000 BCE — some 130 km of open water crossed. Condition notes: 2024 was the warmest year on record, with a mean sea-surface temperature of 21.32 °C. In the first week of July 2025, roughly 65 percent of the basin's surface was under a marine heatwave. Plastic debris has been documented on the bottom of the Calypso Deep. Cf. Gallery 12. See also: the Strait of Gibraltar, displayed as aperture.

What you gain, when the frame turns from century to sea, is a grammar in which a Qing court robe and a Mesoamerican feather work can appear in the same sentence, connected by saltwater and prevailing wind rather than by date. What you lose is the date. The century was the thing that told you an object was not just made somewhere but at one particular moment in the cascade of moments that made it possible. Both frames are true; neither is the kind of frame a wall label, by convention, can hold for you.

[^1]: LACMA, press release, The New David Geffen Galleries, Designed by Peter Zumthor, Open on April 19.

[^2]: Stewart et al., "Re-estimating the depth of the Challenger Deep," Nature Scientific Reports (2021). Dates and areas otherwise from the International Hydrographic Organization's Limits of Oceans and Seas.

[^3]: Schoff (trans.), The Periplus of the Erythraean Sea, §57. The usual date is 40–55 CE. Hippalus, on the standard reading, was a real pilot of the first century BCE; some scholars take "Hippalus" as a personification of the wind.

[^4]: Smeed et al.'s line of RAPID-array work continues to show a weakening trend; see the April 2026 CNN summary of the most recent papers, and Baker et al., PNAS (2025), on the >50% decline constraint.

[^5]: Garcia-Castellanos et al., "Catastrophic flood of the Mediterranean after the Messinian salinity crisis," Nature 462 (2009), 778–781.