In cooperation with his brother Anton Erhard Martinelli , he designed the plans of several baroque church in the Habsburg empire , among which the church in Grossweikersdorf and the Holy Trinity Cathedral in Blaj . He also designed several mansions among which the one in DolnÃ KrupÃ . In cooperation with his brother Anton Erhard Martinelli , he designed the plans of several baroque churches in the Habsburg empire , among which the church in Grossweikersdorf , the Holy Trinity Cathedral in Blaj and the church in DunaalmÃ s. He also designed several mansions among which the one in DolnÃ KrupÃ .