Richardsonian Romanesque is an architectural style that emerged in the late 19th century, primarily in the United States. Named after the architect Henry Hobson Richardson, it is characterized by its robust and heavy appearance, featuring rounded arches, thick walls, and intricate stonework. This style often incorporates elements from medieval European architecture, particularly the Romanesque period. Buildings designed in the Richardsonian Romanesque style typically showcase asymmetrical facades and large, decorative towers. Common materials include granite and brownstone, which contribute to the style's earthy and monumental feel. Notable examples include the Trinity Church in Boston and the Allegheny County Courthouse in Pittsburgh.