it and remodeled in 1913.Rice Building: First and River streets. Calvert Vaux and Frederick Clarke Withers designed this Polychrome 1871 brick flatiron-shaped building. One of the district's rare examples of Victorian Gothic; formerly owned by RPI, the building is now owned by Tai Ventures and is home to several technology businesses.St. John's Episcopal Church: First and Liberty streets. Henry Dudley designed this Stone Gothic Revival church built in 1856 by in the style of English parish churches that closely follows models of church design embraced by the contemporary Oxford Movement.St. Paul's Place: Off State Street between Fourth and Fifth avenues. This is a street of six attached three-story brick rowhouses built ca. 1850. They feature a variation on Italianate norms with bracketed gables and rounded-arch windows and doors rarely seen with that style in an urban environment.Thompson Drug Company Annex: 155-157 River Street. This five-story Richardsonian Romanesque brick building from 1888 copies one of Richardson's buildings in Pittsburgh.Vail House': 46 First Street. This Federal-style 1818 home is the most notable structure to have survived the 1820 fire. Today The city has recognized the historic district in its zoning code. It divides the area into six separate districts — the Riverfront, First, Second, Third, Fourth Street and Fifth Avenue local historic districts. The Riverfront district includes the neighborhood to the northwest listed on the National Register as the Northern River Street Historic District. The other five are roughly aligned with the eponymous streets, with the First Street district consisting of two detached areas, the Second and Third street districts taking up most of the central area and the other two occupying the northeastern corner of the district. The city has also made some grants and tax exemptions available to qualified property owners. The city's current master plan calls for enhancing the district's mixed-use character, by encouraging both residential use and businesses that serve consumers, particularly retailers, and providing tax incentives for the rehabilitation of historic homes. Troy's ordinances designate its Planning Commission as the Historic District and Landmarks Review Commission. Property owners in the district must get special permission from the commission for any work on their properties beside ordinary maintenance (and even for that in some cases), to make sure it leaves the historic character of the property and the surrounding buildings intact. In 1989, the state added most of the district to Troy's Empire Zone. This economic development incentive