So many of Baltimore's Row House Neighborhoods that are hot today had a period of decline at some point. Fells Point, Canton, Jonestown, Federal Hill, Locust Point all had some decline mainly due to the decline of their industrial bases. Mount Vernon stayed a true Gentleman's Community despite decline all around it. Obviously, this begs the question; What Went Right? Most of the time in Baltimore, highways were to blame for decline. Not only that, potential extensions in highways would have caused more devastation in most of Baltimore's best Neighborhoods. In Mount Vernon it seems like highways and wide boulevards have been the reason for Mount Vernon not entering into decline.
Before the construction of I-83 Mount Vernon had a much more prominent connection to Charles Village. It bordered North Avenue which is today's Station North. Charles Village had been named Peabody Heights previously due to Peabody University being located there once upon a time. Goucher College's Campus was also there which explains the nickname given to Station North; "Old Goucher" This is in addition to UMB Mount Royal being right there too. The area between Mount Vernon and Charles Village was that of an old fashion College Town. It's a College Town today, but the meanings of the term have since changed. 
Preston Gardens was Mount Vernon's eastern border. At the time it was residential east of Preston Gardens. It was a one of the City's first segregated Black Neighborhoods. Preston Gardens acted as an informal barrier between the elegant White Row Homes of Mount Vernon and the still elegant Row Homes in the Black Neighborhood that were over crowded and made into Apartments. The Black Neighborhood acted as an informal barrier between Mount Vernon and the prisons. 
Construction of I-83 made for both the northern and eastern borders of Mount Vernon. It also separated it from Charles Village and Black Neighborhoods to the east and the prisons. The Black Neighborhood east of Preston Gardens was all but demolished to make way for I-83. The few homes left in that Black Neighborhood became White as the unofficial race barrier had become I-83. Those few remaining Row Houses east of Preston Gardens have since been demolished as Mercy Hospital continues to expand.
Mount Vernon didn't have and still doesn't have a working class population. So it's no huge surprise that when industry in Baltimore as we once knew it died, the population of Mount Vernon was not greatly effected. Southwest of Mount Vernon, the Retail Mecca that was the Westside of Downtown had collapsed as stores big and small began closing up shop. The construction of Charles Center led to a renewed Central Business District for Downtown. Charles Center was built to be self sustained, something that Urban Planners have shied away from today.
Its fortress like Buildings were built to keep out the blight that had become Downtown Baltimore. Mount Vernon is north of Charles Center and since it hadn't entered into decline, the stark difference between new and old, thriving and blighted was not so apparent. Whether or not this was intentional, the west of Mount Vernon had become like the Westside of Downtown though it borders Bolton Hill. This is what I refer to as the "Midtown Donut" where it's a dead zone that "connects" Bolton Hill to Mount Vernon though it's uncharacteristic of both Neighborhoods.
Its fortress like Buildings were built to keep out the blight that had become Downtown Baltimore. Mount Vernon is north of Charles Center and since it hadn't entered into decline, the stark difference between new and old, thriving and blighted was not so apparent. Whether or not this was intentional, the west of Mount Vernon had become like the Westside of Downtown though it borders Bolton Hill. This is what I refer to as the "Midtown Donut" where it's a dead zone that "connects" Bolton Hill to Mount Vernon though it's uncharacteristic of both Neighborhoods.
Today Mount Vernon is one of Baltimore's most diverse Neighborhoods. It maitians its picturesque Buildings, most of which have been converted into Apartments with ground floor Retail. There is a little bit of new development but since there's hardly been any demolition, it's hard to do. Charles St. has undergone extensive streetscape enhancements, some of the best I've seen in the City. St. Paul St., the southbound half in the couplet is suffering from major traffic problems.
There are two solutions for this, first close off the I-83 ramp, second, get rid of the upper and lower St. Paul Sts and expand Preston Gardens. This will also allow for contruction of the southbound section of the Charles St. Trolley which is supposed to run from Charles Village to the Inner Harbor.
One big mistake that was made in the Charles St. Streetscape enhancements was that in the repaving proccess trolley tracks weren't added in for future use. Above I-83 Station North is making a huge comeback with more plans in the way. Mount Vernon and Charles Village will be connected once more. The dead Midtown Donut is attempting to be "filled."
So, l ask with Mount Vernon, What Went Right? In addition to the obvious lack of White Flight I'd have to say every force that has turned other Neighborhoods in the wrong direction like Interstates and surrounding institutions leaving (Goucher College) has actually worked in the favor of Mount Vernon. I-83 kept it away from North Avenue and the East Baltimroe Public Housing High Rises. The Midtown Donut and Charles Center have kept it from the blight of the Westside of Downtown. Everything that happened in Mount Vernon should have gone wrong but it went right.
