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What was Francesco Borromini’s plan for the piazza at San Giovanni in Laterano?

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Rome: Piazza Navona — Francesco Borromini Piazza Navona, Rome, with the church of Sant'Agnese in Agone, designed by Francesco Borromini, and (foreground) the Fountain of the Moor, originally designed by Giacomo della Porta and revised by Gian Lorenzo Bernini.

Francesco Borromini’s plan for the piazza at San Giovanni in Laterano was an unexecuted urban design intended to create a dynamic setting for the basilica's facade.1

His proposal involved organizing the space around a street passing through the piazza, which would be flanked by 24 uniform building fronts. This arrangement was designed to establish a large-scale, tightly organized environment, demonstrating Borromini’s deep sensitivity to the relationship between his architecture and the surrounding urban planning fabric.1