Von Hoffman v. City of Quincy was a United States Supreme Court case that dealt with the issue of whether a city could be held liable for damages caused by a defective street. The plaintiff, Von Hoffman, was injured when his horse and carriage fell into a large hole in the street. He sued the city of Quincy, claiming that the city was negligent in maintaining the street and that it should be held liable for his injuries. The Supreme Court held that the city of Quincy could be held liable for damages caused by a defective street. The Court reasoned that the city had a duty to maintain the streets in a safe condition and that it had breached this duty by failing to repair the hole in the street. The Court also held that the city was liable for the damages caused by the defective street, even though it had not been aware of the defect. The Court's decision in Von Hoffman v. City of Quincy established the principle that cities can be held liable for damages caused by defective streets. This decision has been cited in numerous cases since then, and it has been used to support the idea that cities have a duty to maintain their streets in a safe condition.

In the case of Von Hoffman v. City of Quincy, the Supreme Court was tasked with deciding whether a city ordinance that prohibited African Americans from living in certain parts of town violated their constitutional rights. The majority opinion held that it did not violate any rights and upheld the ordinance. However, Justice Field dissented from this opinion and argued that such an ordinance was unconstitutional because it denied African Americans equal protection under law as guaranteed by the Fourteenth Amendment to the Constitution. He further argued that since all citizens are entitled to equal protection under law regardless of race or color, no state can pass laws which deny them these protections without violating their Constitutional rights.