In 1950, Mercy Hospital was founded next to the property by the Sisters of St. Joseph Congregation of St. Augustine to serve the booming post-World War II population.

The school uniform chosen by the faculty was a skirt and blouse of a beige drip-dry material, saddle oxfords, along with a dark brown cardigan for winter months.

Ivan Meštrović’s Pieta notable sculpture arrived in Miami the same day and was unceremoniously installed facing Biscayne Bay in front of the Immaculata classroom building.

On June 4, Immaculata's first graduation class of 26 students received diplomas at the Church of the Little Flower (St. Theresa) in Coral Gables, Florida.

Sources: Journal of Sister Mary Alberta Stark, SSJ and 1961 Immaculata Academy Signum Yearbook On September 6, 1960, Immaculata Academy's third school year opened with 440 pupils and ninth grade female students from feeder parishes Gesu Church - Miami, Church of the Little Flower (St. Theresa) - Coral Gables, Sts.

Source: Nancy Foye-Cox, ILS 1964 Classmate's oral history On November 14, 1960, the Immaculata Academy student body marched en masse to Rickenbacker Causeway to greet U.S. President-elect John F. Kennedy, who was en route to a historical meeting with Vice President Richard Nixon on Key Biscayne.

Source: Journal of Sister Mary Alberta Stark, SSJ and 1961 Immaculata Academy Signum Yearbook On February 14, 1961, the ILS Junior class sponsored "The Heart of Fashion" show.

Sources: Journal of Sister Mary Alberta Stark, SSJ and the 1960–1964 Immaculata Academy "Signum" yearbooks and "Corona" student newspaper editions.

They agonized and prayed nightly as they heard students yell "Viva Cristo Rey" before being shot by a firing squad at the Paredon.

They came to the United States, because Cuban prime minister Fidel Castro closed all Catholic churches, convents, and schools, and expelled all priests and religious orders.

A few days later, six former students (Eduardo R. Arellano de Cardenas, Jose M. Arellano de Cardenas, Bienvenido "Benny" Benach Costales, Oscar Bustill Guas, Nestor Machado Lopez-Munoz, and Eduardo Sanchez Rionda) visited the Brothers at the Everglades Hotel in downtown Miami and resolved to assist them in establishing another La Salle school in Miami.

These student co-founders of La Salle High School asked the community for help raising funds and gathering clothing for the Brothers.

On June 3, 1961, 72 Immaculata Academy seniors received diplomas from Bishop Carroll at the Church of the Little Flower (St. Theresa) in Coral Gables.

This was nearly 10 years before Federal Judge E. Clyde Atkins ordered all Dade County schools to be racially integrated by September on January 22, 1970.

Source: 1964 ILS Classmate Toni Williams-Gary's oral history Once again, the Sisters of St. Joseph welcomed diverse students to the school as had always been their tradition in America.

La Salle opened its doors for the first time in late September with 260 students (grades 7 through 12) with a faculty of 13 Christian Brothers.

On December 17, the Immaculata Glee Club presented a Christmas concert – “The Gift,” based on Tchaikovsky's Nutcracker Ballet, under the direction of Sister Mary Josepha Butterfield, SSJ.

In the Spring of 1962, Immaculata and La Salle presented their first joint student production, the senior class play - “The Sound of Music.” In April, the Immaculata Chorus under the direction of Sister Butterfield, SSJ, presented a Spring Concert - “So Proudly We Sing.” The concert was recorded on a 331⁄3 LP record album and sold as a fundraiser.

On June 1, 117 Immaculata seniors graduated with La Salle and Christopher Columbus High Schools at Miami Beach Auditorium.

Theodore E. McCrick - president of the Catholic University of Puerto Rico, and Bishop Coleman F. Carroll of Miami presented the Special Awards.

Source: "Four-ton bronze pieta finds new home" by Marilin A. Moore, MIAMI NEWS, March 8, 1983 In June, Sister Marie Therese Everard, SSJ departed ILS.

Its aim is to invite men and women to work for a social and human transformation, in accordance with Gospel values, from the platform of their own professions, especially those related to the fields of education and culture.

On March 7, 1983, the Pieta sculpture was moved from Our Lady of Mercy Catholic Cemetery to the Archdiocese of Miami Pastoral Center's Garden of Memories, where it remains.

In June 1985, the Salesian Order of St. John Bosco assumed administration of La Salle High School under the direction of Rev.

St. Mary Mazzarello and her first companions were able to profess their perpetual vows, after studying with the Sisters of St Anne for their religious formation, on August 28, 1875 in the presence of Don Bosco.

After many years of revision, discussion and consultation, St. Don Bosco was able to give to the Daughters of Mary Help of Christians the first printed version of their Constitutions on the feast of the Immaculate Conception, December 8, 1878.

Incredibly, even though the storm surge reached the schools second floor, the statue of Mary Help of Christians was untouched according to Jose M. Pazos class of 1995.

On April 24, 2004, the La Salle High School Alumni Association inducted the following charter members into the school's Hall of Fame: 1964 ILS classmate Antonia “Toni” Williams-Gary and 1962 ILS classmates and La Salle student founders Eduardo R. Arellano de Cardenas, Jose M. Arellano de Cardenas, Bienvenido “Benny” Benach Costales, Oscar Bustill Guas, Nestor Machado Lopez-Munoz, and Eduardo Sanchez Rionda.

On April 29, Principal Roche issued a declaration naming the original school building Immaculata Hall during the 1966 Class reunion.

On June 8, Miami Archbishop John C. Favalora sent a letter to Sister Roche granting her request to restore “Immaculata” to the school's name.