CREATE TABLE table_204_10 (id NUMBER, "ecclesiastical jurisdictions" CLOB, "latin name" CLOB, "type" CLOB, "rite" CLOB, "ecclesiastical province" CLOB, "established" CLOB, "area  ( km2 ) " NUMBER)

which was the first diocese to be formed ?
SELECT "latin name" FROM table_204_10 ORDER BY "established" LIMIT 1
SELECT "latin name" FROM "table_204_10" ORDER BY "established" FETCH FIRST 1 ROWS ONLY