Urban spaces are where history is narrated, values and norms are expressed, and people are interconnected; therefore, the quality of the urban spaces influences city dwellers' quality of life. This study is concerned with the quality of the urban space. It investigates the impact of 3D public art on the visual image and meaning of spaces by analyzing three primary parameters: Environmental, Formal, and Compositional Characteristics of 3D public art. A theoretical framework is formulated based on best practices and a literature review illustrating 3D public art design guidelines in urban spaces. Tahrir Square was selected to evaluate the old and new landmarks (3D public art) installed before and after the latest development project in 2020. A survey was conducted to gather data to implement the guidelines. The results indicate that the new 3D public art design improved the space visual image, attracted more users at nighttime, and fulfilled most of the design criteria.