Complex sentence: Pope Sixtus IV praised Stephen as "Verus christiane fidei athleta" ("The true defender of the Christian faith"), but neither the pope nor other European powers sent material support to Moldavia.
Split into simpler sentences: Pope Sixtus IV praised him as "Verus christiane fidei athleta" ("The true defender of the Christian faith"). However, neither the pope nor other European powers sent material support to Moldavia.