What is a characteristic feature of a lancet window?

A lancet window is defined by its tall and narrow form, typically culminating in a pointed arch at the top. This design is a hallmark of Gothic architecture, often found in cathedrals and other significant buildings from that period. The elongated shape of the window allows for the introduction of vertical lines into the overall architectural aesthetic, emphasizing height and drawing the eye upwards, which is an essential characteristic of the Gothic style.

The pointed arch at the top is not just a decorative feature; it also serves a practical purpose by distributing weight more effectively, allowing for larger openings and greater use of glass. This led to the ability to create intricate stained glass designs, enhancing the light and color within the space.

The other options do not accurately describe a lancet window. A rounded arch would represent a different architectural style, while a square-shaped window lacks the distinct characteristics that define a lancet window. A large circular window is typically characteristic of rose windows, which are found in different contexts and styles. Together, these points illustrate why a lancet window is specifically recognized by its tall, narrow structure and pointed arch design.