The Shield of the Trinity or Scutum Fidei - a traditional Christian visual symbol which expresses many aspects of the doctrine of the Trinity, summarizing the first part of the Athanasian Creed in a compact diagram.  Original Latin-language version.  Text was converted to paths for improved display.
Own work
Converted to SVG from the following vector PostScript source code:

%!
/!{def}def/N{counttomark}!/Q{grestore}!/r{rotate}!/p{N 2 idiv{N -2 roll
rlineto}repeat}!/q{gsave}!/m{moveto}!/M{x]o}!/O{show}!/t{/Times-Roman}!
/c{newpath 55 0 360 arc q 1 setgray fill Q l}!/l{stroke}!/J{595.7}!/x{0
0}!/v{rmoveto}!/o{selectfont}! mark 2.5 setlinewidth/X{t 36 o}!/Z{X 49.5
0 v(NON EST)O}!/W{X 14 0 v(EST)O}! 2 120 translate 95.587 575.075 m
180.598 -104.434 0 -208.241 47.63 x 208.241 180.587 104.434 -23.815
41.25 -180.587 -104.434 -181.137 104.434 p l 107.5 J m 192.5 -333.3
192.5 333.3 -385 0 p l 55 591.04 m 215 -372.39 60 0 215 372.39 -30 51.96
-430 0 p l 174 606.5 m Z q 60 r 446 -165 m Z Q q -60 r -395 355 m Z Q
300 484.391 c 105.85 J c 494.15 J c 300 262.4 c q 30 r 566 257 m W Q q
-30 r -140 558 m W Q q -90 r -420 289 m W Q t[32 x 34 M 58 588 m(P)O
-2.5 0 v(A)O -2.5 0 v(TER)O 445.5 588 m(FILIUS)O 253.25 473.5 m X(DEUS)O
t[22 x 23 M 252 268 m(SPIRITUS)O 250.75 247 m(S)show -.75 0 v(ANCTUS)O
pop showpage
%EOF
User:AnonMoos (earlier version of SVG file Michał460)