Spatiousness

The North Flat, or floor or little court, was of the ſame ſpatiouſneſs with that of the Eaſt.

Source: wiktionary

Now, although his abſence from the Court was not intended for any long time, yet the ſpatiouſneſs and pleaſantneſs of the Situation , the flattery and delights of thoſe green trees, and the bubling of the Fountains ſo much delighted him, that made his ſtay the longer; […]

Source: wiktionary

Moreover, Strangers and Forrigners may take notice of the extraordinary commodiouſneſs, conveniency and ſituation of the preſent Royal Palace, and uſual place of Reſidence of our Kings, called White-hall, belonging heretofore to Cardinal Woolſey, ſeated between a noble Navigable River, and a moſt delectable Park; of the great Chamber there, called the Banqueting-Houſe, the like whereof for ſpatiouſneſs, Beauty, Peinture, and exact proportion, no King in Europe can parallel; […]

Source: wiktionary