My focus on the evolution of Viennese coffeehouses and subjective cultural empowerment is defined by Slavonic heritage and women's agentic leadership competence, framed by the Viennese coffeehouse as 'intangible heritage status'- an attribute formally recognised by Unesco in 2011. I focus on these attributes in my Book Series, under the title: "Introducing Vienna's café culture". In this book, the fifth of the series, I draw upon core thematic insights: Heritage Viennese coffeehouses and Slavonic enlightenment; My Series: "Introducing Vienna's Café Culture" within Slavonic frames; The 'Slovakian/ Slavonic' Origins of the Sachertorte; Conceptualising Four Golden/gilded ages; and conclude with the Viennese Coffeehouse as a second cherished home. In my Series, I also highlight Kolschitzky's (1683) establishment of one of the first coffeehouse in Vienna, or indeed Europe. I present a contemporary account of menus, including tantalising coffees, cakes, patisseries, and cuisines on offer. Drawing upon the Slavonic contribution to Vienna, and Unesco's (2011) official recognition of the Viennese coffeehouse and coffeemaking, my Book Series details these coffeehouses: Café Demel (1786); Café Dommayer (1823) [1783]; Café Frauenhuber (1824); Café Vienne (1829); Café Eiles (1840); Café Griensteidl (1847); Café Schwarzenberg (1861); Café Ritter (1867); Café Imperial (1873); Café Landtmann (1873); Café Diglas [Wollzeile] (1875) along with the other four Diglas cafés: Café Diglas (Schottenstift), Dairy Diglas (Café Meierei Diglas) and Diglas at the meat market (Café Diglas, Fleischmarkt); Café Central (1876); Hotel Sacher and Café Sacher (1876); Café Sperl (1880); Conditorei Sluka (1891); Café Westend (1895); Café Savoy (1896); Café Mozart (1899) [1794]; Café Museum (1899); Café Weimar (1900); Café Korb (1904); Café Prückel (1904); Café Goldegg (1910); Café Jelinek (1910); Aida (1913) [1921]; Kaffee Alt Wien (1922); Café Hawelka (1939); Kleines Café (1973-74); and, the last heritage coffeehouse is, Café Hofburg (2004) [1279, the 13th century], the former imperial Hofburg palace. My 'Viennese' Series includes Books (See 3 and 4) focussing on protagonist, Sophia, an ambitious writer, who seeks inspiration at Café Sperl. Sophia's narration frames my subjective insight towards Vienna's coffee society. I illuminate the authenticity of each café, thus, presenting an integrated non-fictional to fictional account of daily Viennese life.