The Pfresbytere; The Presbytère, originally called Casa Curial or “Ecclesiastical House,” was built on the site of the residence, or presbytère, of the Capuchin monks. The building was used for commercial purposes until 1834 when it became a courthouse. In 1911, it became part of the Louisiana State Museum.
Where is the landmark located and description?:

751 Chartres St, New Orleans, LA 70116; The Presbytère is located on the northeast side of Jackson Square, between the cathedral and St. Ann Street. It is a two-story brick building, originally built with a flat roof that had a balustrade topped by urns. Its ground floor has a nine-bay open arcade of elliptical arches, with pilastered corners.
When was it built and who built it?:
1813 By Guilberto Guillemard

The Presbytère was designed to match the Cabildo, alongside St. Louis Cathedral in the French Quarter. It stands today as a beautiful reminder of both Louisiana’s singular past and its vibrant present. It is unclear what the cost to build it was.
How did it or does it pertain to the promotion of peace?

It pertains to the history and culture of New Orleans. 
Why is this landmark important?:

The Presbytère is an architecturally important building in the French Quarter of New Orleans, Louisiana. It was designated a National Historic Landmark in 1970, and is now a property of the Louisiana State Museum.
Why is it important to preserve historical landmarks?:

Historic preservation helps keep communities beautiful, vibrant, and livable, and gives people a stake in their surroundings. It connects people with their past, and with one another.
Five additional interesting facts:

Throughout the 1800s the Presbytere was used for commercial purposes and served as a courthouse from 1834 to 1911. 

In 1847 the structure's mansard roof was added, along with a cupola that was blown off in a 1913 hurricane.

The cupola was replaced in 2006, meticulously modeled after the old one.

The exhibit traces the celebration from its ancient origins to the 19th century emergence of New Orleans' parades and balls to the present-day celebration that 
attracts millions of visitors each year.

Flanking the opposite side of St. Louis Cathedral from the Cabildo and fronting on Jackson Square, the Presbytere has a colorful history of its own.

El Centro espanol de Tampa; El Centro Español de Tampa is a historic building in the Ybor City neighborhood of Tampa, in the U.S. state of Florida. Built as an ethnic and cultural clubhouse in 1912, the red brick structure situated at 1526–1536 East 7th Avenue is today part of a shopping and entertainment complex.
Where is the landmark located and description?:

3208 N Armenia Ave, Tampa, FL 33607; French Renaissance Revival style in the building, with heavy influence from Moorish Revival and Spanish Mediterranean Revival styles. The structure features masonry construction of red brick with white stone accents. The shape is a basic rectangle, exposed on all but the west side, consisting of a two and a half story-tall main block, with an attached rear wing of three and a half stories. The building's south facade along 7th Avenue features an arched main entrance in Moorish style with cast-iron trim. The long, east facade resembles a palazzo, an effect commonly utilized in Renaissance Revival designs, and also incorporates the use of cast-iron balconies.

 Francis J. Kennard in 1912
Why was it constructed and how much did it cost?:

Immigrants from Spain and Cuba immigrated to Ybor City in 1891 established El Centro Español as the first of several ethnic social club and mutual aid society organizations. Since it was built a while ago, it is unclear how much it cost to build.
How did it or does it pertain to the promotion of peace?

It served as an alliance/safe place for immigrants and foreigners.
Why is this landmark important?:

The Centro Espanol de Tampa was a mutual aid society in Ybor City that provided the Spanish immigrants of Ybor a place to call home. The club provided a place for camaraderie and family.
Why is it important to preserve historical landmarks?:

Historic preservation helps keep communities beautiful, vibrant, and livable, and gives people a stake in their surroundings. It connects people with their past, and with one another.
Five additional interesting facts:

It is one of the few surviving structures specific to Spanish immigration to the United States during the late 19th and early 20th centuries.

 El Centro Español de Tampa is one of two individual structures within Hillsborough County to be so designated.

As early as 1974, the building was included by the National Register of Historic Places as one of the Contributing Properties within the Ybor City Historic District. 

The building remains an important component of the district.

It is now home to Jason Fernandez's restaurant Carne.

Fort Fredrica; Fort Frederica was made to protect the southern boundary of his new colony of Georgia from the Spanish in Florida. Colonists from England, Scotland, and the Germanic states came to Georgia to support this endeavor.
Where is the landmark located and description?:
6515 Frederica Rd, St Simons, GA 31522;  Frederica was a military outpost consisting of a fort and town. The entire area was fortified with a palisade wall and earthen rampart. The fort's location on the Frederica River allowed it to control ship travel.
When was it built and who built it?:

1736 by James Oglethorpe
Why was it constructed and how much did it cost?:

It was made to protect the southern boundary of his new colony of Georgia from the Spanish in Florida. It is unclear how much it cost to build.
How did it or does it pertain to the promotion of peace?

It was established to protect the Southern border.
Why is this landmark important?:

Fort Frederica National Monument, on St. Simons Island, Georgia, preserves the archaeological remnants of a fort created between 1736 and 1748 to protect the southern boundary of the British colony of Georgia from the Spanish.
Why is it important to preserve historical landmarks?:

Historic preservation helps keep communities beautiful, vibrant, and livable, and gives people a stake in their surroundings. It connects people with their past, and with one another.
Five additional interesting facts:

About 630 British troops were stationed there.

Fort Frederica's troops defeated the Spanish, ensuring Georgia's future as a British colony. 

Frederica was a military outpost consisting of a fort and town.

By 1743, nearly 1,000 people lived at Frederica.

The fort's location on the Frederica River allowed it to control ship travel.