Joseph Kroll's successor was his eldest daughter, Auguste.
The "National People's Garden" was opened as soon as May 1848 as part of an expansion.
Great attractions were offered first in the garden and later in the great hall, such as performances with wild animals by their tamers and an extensive trade fair in 1849.
In 1850 Auguste Kroll established a permanent summer theatre with open-air performances of operas and other events.
Here, among others, Auguste's protégé Albert Lortzing directed his operas Undine, Der Waffenschmied (The Armourer) and Zar und Zimmermann.

The operation of the new Theatre and Opera Company was suddenly disrupted on 1 February 1851, when the curtains were accidentally set on fire while lamps were being lit.
But Auguste Kroll didn't let that stop her; she encashed the fire insurance sum and on 24 February 1852, the theatre already reopened in a completely new building.
About a year later, Auguste married her capellmeister, the Hungarian violinist, conductor and businessman Jakob Engel.
They successfully expanded the "Kroll Opera Pool" and brought many new comic operas to the stage, but also enacted lengthy music dramas by Richard Wagner.
But the couple could not prevent the business from closing its doors on 1 April 1855.
Despite all efforts, the earnings were far beneath the costs of operation.

One of the creditors, the entrepreneur Heinrich Bergmann, took over the insolvent operation and brought in such luminaries as Jacques Offenbach for one of his first guest appearances in Berlin.
In 1862 however, "Kroll" was again forced into auction, which enabled Jakob Engel to buy it back.
Although the company was still weighed down by debt, Engel was beaming with optimism, and attempted to bring the Berliners back into his establishment in droves with a diverse program – albeit only with moderate success.
The situation worsened in 1869, when the implementation of economic freedom in Prussia led to a boom of newly established amusement parks all over Berlin.

Engel's attempts to sell failed because of the Prussian tax authority and the heavy mortgage that weighed down the business.
In addition, the former parade ground had been refurbished and named Königsplatz (King's Square") by 18 December 1864, the gardens were redone, and later plans were made for a series of monuments to honour the Prussian victories from 1864-71.
After the Franco-Prussian War the Victory Column was solemnly unveiled in the middle of the square on 2 September 1873, while at the same time a long discussion took place at the German Reichstag diet about whether to tear down the Kroll establishment and build a new parliamentary building in its place.
Only in 1876 did these proposals, which were so detrimental to any future investments, get tossed out, so that Jakob Engel was able to proceed with the modernization and improvement of his establishment.
In 1885 – the first time in Berlin – the old gas lighting was therefore replaced by the "Edison system" of electric lighting.
Two years later, Engel was also able to secure a contract extension for another forty years, but he ran out of time to implement his plans.
He died unexpectedly from a stroke on 28 June 1888.
His son tried to continue his work, but the "lack of interest from the Berlin public" for the Kroll stage's artistic presentation forced him to sell in 1894."
Joseph Kroll's successor was his eldest daughter, Auguste. The "National People's Garden" was opened as soon as May 1848 as part of an expansion. Great attractions were offered first in the garden and later in the great hall, such as performances with wild animals by their tamers and an extensive trade fair in 1849. In 1850 Auguste Kroll established a permanent summer theatre with open-air performances of operas and other events. Here, among others, Auguste's protégé Albert Lortzing directed his operas Undine, Der Waffenschmied (The Armourer) and Zar und Zimmermann.
The operation of the new Theatre and Opera Company was suddenly disrupted on 1 February 1851, when the curtains were accidentally set on fire while lamps were being lit. But Auguste Kroll didn't let that stop her; she encashed the fire insurance sum and on 24 February 1852, the theatre already reopened in a completely new building. About a year later, Auguste married her capellmeister, the Hungarian violinist, conductor and businessman Jakob Engel. They successfully expanded the "Kroll Opera Pool" and brought many new comic operas to the stage, but also enacted lengthy music dramas by Richard Wagner. But the couple could not prevent the business from closing its doors on 1 April 1855. Despite all efforts, the earnings were far beneath the costs of operation.
One of the creditors, the entrepreneur Heinrich Bergmann, took over the insolvent operation and brought in such luminaries as Jacques Offenbach for one of his first guest appearances in Berlin. In 1862 however, "Kroll" was again forced into auction, which enabled Jakob Engel to buy it back. Although the company was still weighed down by debt, Engel was beaming with optimism, and attempted to bring the Berliners back into his establishment in droves with a diverse program – albeit only with moderate success. The situation worsened in 1869, when the implementation of economic freedom in Prussia led to a boom of newly established amusement parks all over Berlin.
Engel's attempts to sell failed because of the Prussian tax authority and the heavy mortgage that weighed down the business. In addition, the former parade ground had been refurbished and named Königsplatz (King's Square") by 18 December 1864, the gardens were redone, and later plans were made for a series of monuments to honour the Prussian victories from 1864-71. After the Franco-Prussian War the Victory Column was solemnly unveiled in the middle of the square on 2 September 1873, while at the same time a long discussion took place at the German Reichstag diet about whether to tear down the Kroll establishment and build a new parliamentary building in its place. Only in 1876 did these proposals, which were so detrimental to any future investments, get tossed out, so that Jakob Engel was able to proceed with the modernization and improvement of his establishment. In 1885 – the first time in Berlin – the old gas lighting was therefore replaced by the "Edison system" of electric lighting. Two years later, Engel was also able to secure a contract extension for another forty years, but he ran out of time to implement his plans. He died unexpectedly from a stroke on 28 June 1888. His son tried to continue his work, but the "lack of interest from the Berlin public" for the Kroll stage's artistic presentation forced him to sell in 1894."
Kroll Opera House