He was born in the village of Migonys near Kupiškis, in the Grand Duchy of Lithuania. His father was a Lithuanian peasant, Simonas Masiulis.[4] He was baptized as Laurynas Masiulis.[4] His Lithuanian mother, Kotryna Žekonytė Masiulienė, died early in his youth, and her relative and his godmother Anna Gucewicz née Baltušytė (Lithuanian: Ona Baltušytė-Gucevičienė) supported him and financed his studies. After her he changed his surname to Gucewicz. He attended local schools at Kupiškis and Palėvenė and then the gymnasium in Panevėžys. According to his student and biographer Karol Podczaszyński, the school in Kupiškis was the place where Gucevičius for the first time started to learn the Polish language.[5] In 1773 he joined the Academy of Vilnius. He studied engineering, attended the lectures on architecture held by Marcin Knackfus.[6] Around that time, he also became a missionary monk.
In the following years he travelled through the countries of Western Europe, where he attended lectures on architecture and learned from the works of the most renowned architects of the time. He visited France, Denmark, Sweden and various German states.[6] He spent a year and a half studying in Paris under the guidance of Jacques-Germain Soufflot and Claude Nicolas Ledoux.[3] On his return, he was hired by Bishop Ignacy Jakub Massalski, for whom he designed and built the episcopal palace in Verkiai, later known after its later owners, the Wittgenstein family. The palace and the surrounding architectural complex, the work on which was commenced by Gucevičius's tutor Knackfus, is currently considered one of the most valuable classicist complexes in Lithuania.[9]
In 1789 Gucevičius became a professor of architecture and topography at the Artillery and Engineering Corps' School of Vilnius. In 1794 he also returned to his alma mater, where he became a professor of civilian architecture[6] and held the chair in engineering. In 1794, at the outbreak of Kościuszko's Uprising, Gucevičius joined the ranks of the local civil guard and took part in the Vilnius Uprising against the Russian garrison. He became one of the leaders of the local militia formed out of volunteers. Wounded in a skirmish near Ashmiany (modern Belarus), he was demobilised. Following the Partitions of Poland, when Vilnius was annexed by Imperial Russia, the new authorities expelled Gucevičius from the academy for his part in the uprising. However, in 1797 he returned there, this time as a head of the newly founded separate chair of architecture.[10]
Around that time Gucevičius created the most renowned of his works. First was the new town hall of Vilnius, completed around 1799.[12] He also constructed a similar, yet smaller town hall in Widze near Bratslav (modern Vidzy, Belarus). Between 1777[13] and in 1801 he worked to rebuild the Vilnius Cathedral (which had undergone many reconstructions, and had been partially Baroque) in the neoclassical style. It is sometimes said that his reconstruction of the cathedral, modelled after a Roman temple, pre-dated the work of Thomas Hamilton and James Playfair, two notable Scottish architects to introduce classicism in the United Kingdom.[14]
He is credited with a number of other projects, although their actual authorship is not documented. Among them is the palace of the Tyzenhaus family in Rokiškis (completed in 1801), the reconstruction of the castle in Raudonė for its contemporary owners, the Olędzki (Olendzki) h. Rawicz family, and the manor house in Čiobiškis. He is also thought to have prepared designs of palaces for other notable magnate families of the time, including Radziwiłł, Sapieha, Pac, Chomiński and Scypion,[6] though World War II losses in the preserved archives make the matter difficult to settle definitively.[15] Additionally, he designed several merchant houses in Kretinga[6] and was the author of a topographic map of the western part of the city of Vilnius.
He died on 10 December 1798. The location of his burial is unknown but is presumed to be the churchyard of the Church of St. Stephen in Vilnius.[16] In his last will he dedicated all of his projects to the Polish–Lithuanian Commonwealth, and some of the surviving sketches and designs are currently held in the library of Warsaw University.[17][18]
^Jan Kazimierz Wilczyński (1847). Album wileńskie J. K. Wilczyńskiego, obywatela powiatu wiłkomierskiego (Vilnian Album of J.K. Wilczyński, a citizen of the powiat of Wiłkomierz) (in Polish).
^Stanisława Sawicka; Teresa Sulerzyska (1960). Straty w rysunkach z gabinetu rycin Biblioteki Uniwersyteckiej (Losses in the drawings of the Hall of Plates of the Warsaw University Library) (in Polish). Warsaw: Warsaw University. p. 64.
^Teresa Sulerzyska (1969). Katalog rysunków z Gabinetu Rycin Biblioteki Uniwersyteckiej w Warszawie (Catalogue of the Hall of Plates of the Warsaw University Library) (in Polish). Vol. II. Warsaw: Warsaw University.
