CREATE TABLE table_2963 ("Name" TEXT, "Aperture m" TEXT, "Aper. in" TEXT, "Mirror/type" TEXT, "Nationality/Sponsors" TEXT, "Site" TEXT, "Built/Used" TEXT)

Which telescopes were sponsored by or originated in Belgium?
SELECT "Name" FROM table_2963 WHERE "Nationality/Sponsors" = 'Belgium'
SELECT "Name" FROM "table_2963" WHERE "Nationality/Sponsors" = 'Belgium'