In adulthood Architect Kamen Petkov gets achieving a major task – with funds granted by the Vatican as an aid for victims of the great earthquake in 1928, the Catholic population in Plovdiv and around the villages. To carry out the design of several projects: restoration of the Catholic cathedral "St. Ludwig"; Catholic school" St. Andrew"; and the Catholic Diocese, all three in Plovdiv. Also Catholic churches in the villages of General Nikolaevo; Sekirovo, Belozem Parchevich and Borets. Arch Petkov received that task after winning a competition among several Bulgarian and Italian architects. The jury is done in the Vatican.