September 2 - Opening of the Teatro Comunale (Ferrara) in Italy to the design of Cosimo Morelli and Antonio Foschini.
Building of the first major example of Egyptian Revival architecture, Karlsruhe Synagogue in Baden to the design of Friedrich Weinbrenner.
Completion of the neoclassical summer retreat at Castle Coole in Northern Ireland to the design of James Wyatt.
Completion of the theatre and summer retreat at Ostankino Palace near Moscow.
Completion of the Massachusetts State House in Boston to the design of Charles Bulfinch.
Completion of the Royal Chapel of St. Anthony of La Florida in Madrid to the design of Felipe Fontana.
Completion of the İzzet Mehmet Pasha Mosque in Safranbolu, Turkey.
Completion of first São João National Theatre in Porto, Portugal as an opera house to the design of Vicente Mazzoneschi.
Opening of the Teatro della Concordia in Iesi, Ancona.
Building of Bewdley Bridge over the River Severn in England to the design of Thomas Telford.
Opening of the skew Store Street Aqueduct on the Ashton Canal in Manchester to the design of Benjamin Outram.
May 6 - Joseph Welland, Irish architect (died 1860)
June 27 - Joseph John Scoles, English Catholic architect (died 1863)
October 14 - Félix Duban, French architect (died 1870)
June 25 - Thomas Sandby, English watercolour artist and architect (born 1721)
November 2 - Charles de Wailly, French architect (born 1730)
December 10 - Laurynas Gucevičius, Lithuanian architect (born 1753)
1798 in architecture Wikipedia
The year 1798 in architecture involved some significant events.