Clayton (Frick Mansion) is a Châteauesque mansion in Pittsburgh, Pennsylvania. Built in 1870, it was designed by Frederick J. Osterling, and is listed on the U.S. National Register of Historic Places.
Location: Point Breeze, Pittsburgh, Pennsylvania, United States
Verified facts
- Designed by Frederick J. Osterling
confidence 90/100 · 4 independent sources · SRC-1671, SRC-1669, SRC-4255, SRC-4256 - Built in 1870
confidence 70/100 · 3 independent sources · SRC-1670, SRC-1672, SRC-4256 - Architectural style: Châteauesque
confidence 80/100 · 6 independent sources · SRC-1671, SRC-1673, SRC-6284, SRC-6285, SRC-8235, SRC-4255 - Historic designation: National Register of Historic Places
confidence 90/100 · 4 independent sources · SRC-1674, SRC-1669, SRC-1670, SRC-4255
Evidence & sources
- SRC-1669 — The Frick Pittsburgh (Wikipedia) (Tier 3, encyclopedia; retrieved June 2026)
- SRC-1670 — 90.5 WESA — Frick Pittsburgh's Clayton mansion added to National Register of Historic Places (Tier 2, news_article; retrieved June 2026)
- SRC-1671 — The Frick Pittsburgh — Historic Home and Gardens (Tier 1, official_archive; retrieved June 2026)
- SRC-1672 — Pittsburgh Magazine — The Frick Pittsburgh's Clayton Mansion Officially Joins National Register of Historic Places (Tier 2, news_article; retrieved June 2026)
- SRC-1673 — American Aristocracy — Clayton (Tier 3, research_blog; retrieved June 2026)
- SRC-1674 — The Frick Pittsburgh — press release (Clayton now a Nationally Registered Historic Place) (Tier 1, official_archive; retrieved June 2026)
- SRC-4255 — experiencepa.com (Tier 2, journalism; retrieved June 2026)
- SRC-4256 — hmdb.org (Tier 2, journalism; retrieved June 2026)
- SRC-6284 — Modern Day Tripper — Clayton Mansion (Frick), Pittsburgh, PA (Tier 3, travel blog; retrieved June 2026)
- SRC-6285 — Wonderful Museums — The Frick Museum Pittsburgh PA (Tier 3, museum guide; retrieved June 2026)
- SRC-8235 — Bee's First Appearance — Clayton, Henry Clay Frick's Pittsburgh Home (Tier 3, history_blog; retrieved June 2026)
How we verify
Every fact above is independently corroborated by at least two reputable sources and
confidence-scored before publication. Claims that cannot clear that bar are withheld. We show the
street address only for non-residential public landmarks (museums, commercial and civic buildings,
publicly documented filming-location sites); the exact addresses of private residences and any
personal information are structurally barred from publication. Last reviewed June 2026.