The architecture of the Romanesque period accentuates a fortress-like massiveness, semicircular arches (using falsework), and the Latin cross plan. Furthermore, more minuscule details of the period include usage of corbels and small window apertures. Directly contrasting the massiveness of the Romanesque Period is the Gothic Period. The Gothic Period emphasizes verticality and elongation in construction (ogival geometry and spires). The Latin Cross Plan is still used, but there is more variety. Elements such as rib vaults and flying buttresses are brought about. Entryways (westworks) become more complex, with elements such as rosettes and portals (composed of trumeau, tympanum, etc.).