CREATE TABLE table_203_665 (id DECIMAL, "name" TEXT, "municipality" TEXT, "established" DECIMAL, "tower height\ in meters  ( ft ) " TEXT, "focal plane\ in meters  ( ft ) " TEXT, "current status" TEXT, "current condition" TEXT)

which municipality was the first to be established ?
SELECT "municipality" FROM table_203_665 ORDER BY "established" LIMIT 1
SELECT "municipality" FROM "table_203_665" ORDER BY "established" NULLS FIRST LIMIT 1