A single-lancet window is a window, usually small in size, whose upper part ends with an arch and has no subdivision, and therefore has only one opening. The splayed single-lancet windows are characterised by flaring in the wall, from the outside towards the inside, known as a splay.![](https://www.smarteducationunescosicilia.it/wp-content/uploads/2021/01/appr-6333-architettura-monofore-strombate.jpg)