In this paper work are described in details architectural, sculptural and pictorial phenomena of the three most significant examples of Zagreb's gothic age: the Saint Mark's church on Zagreb's Uppertown, the cathedral of Zagreb and the Saint Francis's church on the Capitol. The Saint Mark's church is three-nave hall-type church with a main portal on the South, equipped with the sculptures of Jesus Christ, apostles, Our Lady and Saint Mark. There is a diverse number of theories regarding their origin, from which are the most significant Anđela Horvat's theory about the Parler's artwork school in Prague as well as Zorislav Horvat's theory about three different influences: from Schwäbisch-Gmund school, from the sculptures of the Albertinian choir and from the viennese sculptural school. The cathedral is also three-nave hall-type church, that arose from the fundamenta of an older Romanesque cathedral, with a thirteenth-century sanctuary, lateral chapels, sacresty, treasury and an Early-baroque bell tower. The examples of Parlerian workshop are being conserved on the side window shafts, like monstruous masks and the set of real and fictional animals, as well as the bishops' coats of arms on the column capitals. The cathedral's sacresty contains fresco paintings with theme of the Last Judgement, as well as the fresco painting of Saint Timothy and the other saints. The chapel of Saint Steven contains the oldest preserved fresco paintings of the gothic age in Zagreb, with three theme fields: the Last Judgement, Christ's life and Mary's Incoronation. It is being held for them to originate from the Rimini painters' circle as well as from the Giotto's Middle Italy painting. The Saint Francis's church is the oldest monastery church in Zagreb, which monastery was found, according to the legend, by Saint Francis himself. It is a one-nave church with lateral chapels, bell tower and side buttresses. All these churches have been restored after the earthquake in the 1880 according to the project of Herman Bollé.