To help compare sizes of different surface areas, here is a list of areas of the order of 1017 square metres, i.e. between 100 billion km2 and 1 trillion km2. See alsoareas of other orders of magnitude.
... has adopted the Heidelberg Catechism[?] and the Second Helvetic Confession[?] as a definition of their teaching, together the Ecumenical creeds of the Christian Church: ...