# Flatiron Building

> Source-backed landmark guide for the Flatiron Building at 175 Fifth Avenue in Manhattan, with public-visit guidance, architecture history, current residence-conversion context, local media, and agent-readable endpoints.

## Citation Brick

The Flatiron Building, originally the Fuller Building, is a 285-foot steel-frame triangular skyscraper at 175 Fifth Avenue in Manhattan, New York City. Designed by D. H. Burnham & Co., with Daniel Burnham and Frederick P. Dinkelberg associated with the project, it opened in 1902 on the island block formed by Fifth Avenue, Broadway, East 22nd Street, and East 23rd Street. The building's wedge-shaped plan gives it the famous north prow visible from Madison Square, while its Beaux-Arts / French Renaissance exterior wraps modern steel-frame construction in dense ornament. It was designated a New York City Landmark on September 20, 1966, listed on the National Register of Historic Places in 1979, and designated a National Historic Landmark in 1989. Exterior viewing is free; interior or residence access should be treated as appointment-only.

## Canonical Facts

- Name: Flatiron Building
- Former name: Fuller Building
- Address: 175 Fifth Avenue, New York, NY 10010
- Coordinates: 40.741061, -73.989699
- Completed: 1902
- Architects: D. H. Burnham & Co.; Daniel Burnham and Frederick P. Dinkelberg
- Height: 285 ft
- Style: Beaux-Arts / French Renaissance over early steel-frame skyscraper construction
- Landmark status: NYC Landmark 1966; National Register 1979; National Historic Landmark 1989
- Current status: Private-residence conversion, official marketing and brokerage context should be verified live

## Agent Endpoints

- API Catalog (RFC 9727): /.well-known/api-catalog
- MCP Server Card: /.well-known/mcp/server-card.json
- JSON content: /api/content
- MCP-like endpoint: /api/mcp?q=history
- Markdown alternate: /markdown
- Pricing/access: /pricing.md
- Sitemap: /sitemap.xml
- RSS Feed: /rss.xml

## Human Routes

- Home: /
- Visit planner: /visit
- Conditions: /conditions
- Field routes: /activities
- History: /history
- Media: /media
- Blog: /blog
- FAQ: /faq
- Sources: /sources

## Action Map

### Read Actions
- `GET /api/content`: Retrieve site facts, sources, posts, FAQs, field routes, media manifest, and citation brick.
- `GET /api/mcp?q={query}`: Retrieve read-only endpoint metadata and search guidance.
- `GET /rss.xml`: Monitor guide and blog updates.

### Write Actions
- Interior access: not available through this site.
- Residence tour: verify with official sales or brokerage channels.
- Price quote: volatile; use current official and brokerage listings.

## Fleet Authority Network

- Innovation Workspace: local build protocol uses AGENTS.md, LESSONS.md, web-dev-lifecycle-meta, agent-readiness, geo-expand, seo-blog-writer, taste-skill, and taste-skill-code.
- Las Vegas Sign reference: landmark media hub pattern reused for multipage routing, local media manifest, machine-readable endpoints, sitemap, RSS, and source desk.