Monumento à Paz Mundial, Peace monument in Bosque dos Buritis, Goiania, Brazil

The Monumento à Paz Mundial is a five-metre cement sculpture by Siron Franco in Bosque dos Buritis, Goiânia, weighing about fifty tonnes and shaped like an hourglass. Its central section holds glass compartments divided by vertical yellow, blue, white, green and red bands, each with soil from the five continents; a larger compartment mixes samples from all of them.

The monument was inaugurated in September 1988 in response to the cesium-137 radioactive incident that had occurred in Goiânia. Its creation coincided with a national gathering focused on promoting peace amid nuclear concerns.

The monument's hourglass form carries a quote from Bahá'u'lláh: "The Earth is one country, and humankind its citizens." Each year the Bahá'í Community of Goiânia marks the International Day of Peace with a ceremony in which soil sent by embassies is deposited inside the work; the monument now holds 101 soil samples from different countries.

The monument stands inside Bosque dos Buritis in the Setor Oeste district of Goiânia. The hourglass is five metres tall and weighs about fifty tonnes, so it is seen from ground level; the glass compartments with the soil samples sit in its central section. Soil samples are added during ceremonies, so the contents change over time.

Colored vertical stripes in yellow, blue, white, green, and red divide the monument's internal compartments. These bands create a striking visual feature while also symbolizing the diversity of Earth's nations in a simple, direct way.