Bulgaria, Ivan Alexander and Mikhail Asen, 1331 - 1355 A.D. Ivan Alexander met Byzantine and Serbian threats, and led economic recovery and a cultural renaissance. But later he was overwhelmed by Ottoman and Hungarian invasions, and the BlackDeath. In an ill-fated effort to combat these problems, he divided the country between his two sons. Bulgaria would face the imminent Ottoman conquest weakened and divided. Silver grosch, Radushev - Zhekov 1.13.3 - 6, EF, weight 1.431g,maximum diameter 22.6mm, die axis 180o, 1331 - 1355 A.D.; obverse Christ, nimbate, enthroned, facing, with both hands raised in benediction, monogram either side; reverse Ivan and Mikhail standing facing, holding standard in center, twostars inner fields, monogram in outer fields;