# R1 | google/gemini-3.6-flash | run 1

## Prompt

In what year was the Eiffel Tower completed, and how tall is it including antennas? Cite your sources.

## Response

The Eiffel Tower was completed in 1889 for the Exposition Universelle in Paris. Including its summit broadcast antennas, the tower stands at a total height of 330 meters (1,083 feet).

## Completion of the Eiffel Tower

Construction on the Eiffel Tower began in January 1887 and officially wrapped up on March 31, 1889 [Britannica Article](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHVObGjAtoRqGZ90b_83vZCI5ELzK_6hNgMMqgoXbcyfE1a6EDg5zSrPW8e4lnUfxuN2WOjYx6A9loPI2iXBBX-SbbCp3o7WxMhdDPWKyznZ7zqGxp3QU82cdUUNgpApPVWnMIQob5nLSa2HGA7jItSBGGjEg==). Designed by civil engineer Gustave Eiffel, the landmark served as the entrance gateway to the 1889 World's Fair, celebrating the centenary of the French Revolution [Eiffel Tower History](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHbNyOewEC3c_6CQgUEVj4lIgj25HCJc4_57nIYjFpyupkYQnDMB2dOjcz7iiaZU_pqlF-pHSmTXBhGWQUlDAK1u4gbJVJVXOMreM8AOllFCS9SROv_Sh3iySgN_cf4dfrEwPifadY=).

## Height Evolution and Antennas

The wrought-iron base structure reaches 300 meters (984 feet) [Eiffel Tower Travel](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGua4sl-lEhOlTvOWRWdtoWEb6I5E66x36IZTdrPFB4Rohkd59vNIKoSrkuW5J2w-gDu35_12pyzyM-rma2VbcivFcM1GQYPSgJCdkERlydweSBalwpYUhotVd9izh3u_t6uYuDgK8FHA==). Additions of transmission antennas over time have altered the overall height:

* **1889:** Standing at 312 meters (1,024 feet) with the initial flagpole atop the dome [Paris Guide Article](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGQY8nBb5WBntdCtA9ryf9oCsdy75BrfYpy1IfWIAciI0_k6e3FAHLiA8KKnRx_cCMVItmeGB91E70AY3nl_UkqrqT2VwS-qQBFxta9r_ZTYCPSUPbv-xadhlfMYZcFF4WxXYSzUfUQoikNEqppFYq0x6x-lDfXRCZY7Wb6I9FN6dV9TRB2EwEbDfi50rbewikcEDGM3w==).
* **1957:** Increased to 320.75 meters (1,050 feet) following the addition of television broadcast equipment [Paris Guide Article](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGQY8nBb5WBntdCtA9ryf9oCsdy75BrfYpy1IfWIAciI0_k6e3FAHLiA8KKnRx_cCMVItmeGB91E70AY3nl_UkqrqT2VwS-qQBFxta9r_ZTYCPSUPbv-xadhlfMYZcFF4WxXYSzUfUQoikNEqppFYq0x6x-lDfXRCZY7Wb6I9FN6dV9TRB2EwEbDfi50rbewikcEDGM3w==).
* **2000:** Raised to 324 meters (1,063 feet) with an updated antenna system [French Glimpses Report](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFar2lM-w2h3r1sRoX99CaJUG-sVbAuFg-bY8SEC1_Q44ol1ZNSRAeSVF1GKeJiDM3KD9ghRmyKuo6rq4xFRdOHbUOm9rvRrxKIm9Nstswrger_9ZfY0SREYk7coE9wbc4G1nkfIfiE9SkrPYczbQezhF53A80XL4LiloHj17xAZOoqNE-7B_Z3R6lnTO-ShZKQak77).
* **2022:** Reached its current height of 330 meters (1,083 feet) after a helicopter installed a new 6-meter digital radio (DAB+) antenna [Global Times Report](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQF5q2AogxZKOuFYJdqqRWfkIF1R7gjij63hfDvHlXZFZ7X1YGN4lJHPllDxil9t0Pzj0Jsn9yqxYoHAZBY6qwu8hyIvTnrBsCaQFl-b_ArF8aZ2V6sWUoBLWeiJd0TXLyMjkr0QzEPeohHG-D5BVg==).

Would you like to learn more about how thermal expansion temporarily changes the tower's height during summer?
