Spomenik je bil postavljen leta 1969 ob finančni pomoči izseljencev v ZDA. Doprsne kipe je izdelal kipar Zdenko Kalin. Možje, ki jih kipi predstavljajo:
Miroslav Vilhar - pesnik, skladatelj, politik in narodni buditelj. Mnoge njegove pesmi so ponarodele (Lipa zelenela je, Po jezeru bliz Triglava, Zagorski zvonovi...). Na njegovo ustvarjalnost je v veliki meri vplival Fran Levstik, ki je prišel na grad Kalc kot domači učitelj Vilharjevim osmim otrokom.
Leta 1861 je bil izvoljen za poslanca kranjskega deželnega zbora. Skupaj z Levstikom sta začela izdajati časnik Naprej. Zaradi članka v časniku je Vilhar odsedel 6 tednov v zaporu. Več let je bil župan v Knežaku. Sodeloval je pri ustanovitvi čitalnic v Planini pri Rakeku. Najpomembnejše Vilharjevo politično delo pa je bilo povezano s taborom na Kalcu. Tabori so bili politična zborovanja Slovencev, ki so se začela v sredini 19. stoletja. Na njih so podpirali program Zedinjena Slovenija iz leta 1848, ki je predvideval združitev vseh Slovencev v avtonomno politično enoto. Zahtevali so tudi enakopravno rabo slovenščine v javnem življenju (šole, uradi...). Na Kalcu je bil 6. od 17. taborov na Slovenskem.
Alojz Valenčič - doma je bil iz bližnjega Bača. V teh krajih je bil steber podtalne mladinske narodnjaške organizacije TIGR, ki se je borila proti fašizmu, vzbujala pozornost javnosti glede vprašanj slovenske manjšine in budila med prebivalstvom zavest, da je odpor proti fašizmu mogoč. Zahodni del Slovenije je namreč po prvi svetovni vojni zaradi Londonskega sporazuma, ki ga je Italija podpisala leta 1915 in s tem med prvo svetovno vojno stopila na stran antantnih sil, prišel pod Italijo. Fašistični režim je kruto ravnal s Slovenci in zatiral slovensko kulturo. Valenčiča so leta 1930 fašisti ustrelili na Bazovici. Organizacijo TIGR so fašisti odkrili po napadu na italijanski časnik Il Popolo di Trieste. Obtoženim za napad so sodili na 1. tržaškem procesu. Štirje, med njimi tudi Valenčič, so bili obsojeni na smrt, ostalih 12 pa na zaporne kazni.
Tone Tomšič - rojen v Trstu, kasneje se je po očetovem odhodu na fronto z materjo preselil na Bač (tam sta bila doma oba starša). Prva dva razreda je obiskoval v kneški šoli. Po prvi svetovni vojni so se s starši preselili nazaj v Trst, kjer so Slovence vse bolj preganjali. Zato so se vsi skupaj preselili v Ljubljano. Že od majhnega je bil Tone na strani trpečih, zapostavljenih in preganjanih ljudi. Ko je odrasel, je vedno bolj čutil krivico, ki je ločila ljudi na gospodarje in sužnje, na Italijane in Slovence. Postal je revolucionar, ki je imel zelo rad slovenski narod, ljubil je slovensko zemljo. Večkrat je bil zaprt, neprestano je bil preganjan. Med drugo svetovno vojno je bil izdan, fašisti so ga ujeli on obsodili na smrt. Maja 1942 so ga ustrelili v gramozni jami pri Ljubljani.
The monument was erected in 1969 with the financial assistance of emigrants in the United States. Sculptures were made by sculptor Zdenko Kalin. Men who statues represent:
Miroslav Vilhar - poet, composer, policies and one of the leader of national awakening. Many of his songs are nowadays folk songs (Lipa zelenela je, Jezero bliz Triglava, Zagorski zvonovi...). His creativity is largely influenced by Fran Levstik, who came to the castle Kalc as a home teacher of Vilhar's eight children.
In 1861 he was elected to the Provincial Assembly. Together with the Levstik began publishing the newspaper Naprej. Due to an article in the newspaper Vilhar spent six weeks in prison. For many years he was mayor in Knežak. He cooperated in the setting up of "čitalnice" in Planina near Rakek. The most important Vilhar's political work was associated with the "tabor" on Kalc. "Tabor-s" were political gathrings of Slovenes, which began in the mid-19th century. They supported poloitical programme "Zedinjena Slovenija" (United Slovenia) from 1848, which envisaged the unification of all Slovenes in the autonomous political unit. They also requested the equal use of the Slovenian language in public life (schools, offices ...). At Kalcu was 6th of 17 camps in Slovenia.
Alojz Valenčič - his home was from at nearby Bač. In this area he was a pillar of ground youth nationalist organization TIGR, who fought against fascism, calling attention to the public on the issues of the Slovenian minority and awakened consciousness among the population that the resistance against fascism was possible. Italy signed London agreement in 1915 and stepped to the side of Enetente forces during World war I. After that agreement western part of Slovenia fell under Italian rule after the war. Fascist regime was cruel to Slovenes and suppressed Slovenian culture. Valenčič was shot by fascists at Bazovica in 1930. TIGR was discovered by the fascists after the attack on the Italian newspaper Il Popolo di Trieste. Indicted for assault were trialed on the 1st process of Trieste. Four, including Valenčič, were sentenced to death, and the remaining 12 on prison sentences.
Tone Tomšič - born in Trieste, and later, after his father's departure to the front, with moved his mother to Bač (there were at home, both parents). The first two classes he attended in Knežak school. After the First World War, the parents moved back to Trieste, where Slovenes were increasingly persecuted. Therefore, they all moved to Ljubljana. Ever since he was a small Tone was on the side of the suffering and persecuted people. When he grew up, he increasingly felt the injustice that has separated people into masters and slaves, to the Italians and Slovenes. He became a revolutionary, who had very fond of the Slovenian nation, loved the Slovenian soil. Several times he was imprisoned, he was constantly persecuted. During World War II fascists caught him and he was sentenced to death. In May 1942, he was shot in a gravel pit near Ljubljana.
(Vir/Source: Iskra, M., 1996: Naravna in kulturna dediščina šolskega okoliša, Knežak)