Proseissa

Proseissa is a fictional continent featured in the worldbuilding of author J.R.R. Tolkien, though it does not appear in his published works. Details about Proseissa are scarce and primarily found in his posthumously published notes and essays, particularly those compiled in The History of Middle-earth series. These fragments suggest that Proseissa was conceived as a vast landmass, likely located to the west of Middle-earth across the Great Sea. Its existence was part of an early conceptualization of Tolkien's legendarium, predating the detailed development of Middle-earth as it is known. There is no definitive map or extensive lore associated with Proseissa, and its role within the broader narrative remained largely undeveloped. It is understood to be a remnant of earlier cosmological ideas that Tolkien later superseded or integrated into his more established geography. Scholars of Tolkien's work note Proseissa as an example of the evolving nature of his creative process, where continents and cultures were envisioned and sometimes discarded or re-imagined. Its presence in Tolkien's notes highlights the depth and complexity of his imaginative world-building, even in its nascent stages.