This excludes the two large apartment buildings, constructed later at the intersection with Lexington Avenue on the west side of the block.

[1] In the decades at the end of the century, the city's wealthy began building large houses for themselves near the park, sometimes demolishing the original rowhouses to do so.

[7] Shortly after Marquard's death, Hunt's was sold to Joseph Pulitzer, then publisher of the New York World, who lived several blocks to the east at 73rd and Park.

[5] At that same time, in 1907, Standard Oil heir and philanthropist Edward Harkness, who lived nearby at Fifth Avenue and 75th Street, bought 161.

He spent two years converting it into a garage with a squash court and locker room upstairs, in addition to chauffeur's quarters.

[1][9] The district's buildings fall into three types, representing different eras of local development: two Italianate rowhouses, 11 carriage houses and two taller structures built for commercial purposes.

The carriage houses came later, some built on the site of demolished early rowhouses, with the commercial buildings coming near the end of the block's development.

[3][10] All the carriage houses follow a similar basic plan that persists despite later conversion into private homes and a variety of facade materials.

The Romanesque house at 166 has a finely detailed corbelled brick cornice with its date of construction, 1883, in cast iron letters below.

[12][13] The last building in the carriage house row on the south side, 178 East 73rd, combines Beaux Arts decor with neo-Georgian brickwork.

Both were originally built for paying customers who rented and were not wealthy enough to afford their own separate buildings rather, with 177–79 the only one on the block designed with automobile use in mind.

It is a Beaux Arts building on an exposed limestone and granite foundation with the middle stories faced in brick with terra cotta trim.

Its upper story is a mansard roof pierced by three unusually large dormer windows with terra cotta enframements.

[8] Across the street, 182 East 73rd is a brick Romanesque Revival structure with stone trim and cornices separating several of its stories.