The wedding of Lord Semine and Agnes isn't without its hitches. Lord Semine's ceremonial sword has vanished, and you're tasked with its recovery. Here's how to find it in *Kingdom Come: Deliverance 2*.
Finding Lord Semine’s Sword
Radovan reveals the missing sword—your creation from the Hermit's blade—intended as a wedding gift. He saw a suspicious figure in yellow earlier. Your search begins with finding someone in yellow clothing.
Questioning those in yellow yields little initially. However, some point towards a man in yellow seen heading upstairs in the stables. Investigate the stable's upper level to find Hans, romantically involved with a woman.

While Hans isn't the thief, he witnessed Svatya (the bailiff's son and the bride's brother) taking the sword. He doesn't know Svatya's subsequent actions, suggesting you question Svatya directly.
Confronting Svatya
Find Svatya near the musicians playing for the wedding guests. He's easily spotted drinking by the stable wall, sword in hand.
Svatya confesses to stealing the sword, motivated by resentment towards Old Semine. His intention was to embarrass Old Semine, but he neglected to consider the consequences. He reveals he tossed the sword into a nearby pond.
Retrieving the Sword

Locate the pond (easily found behind Radovan, or if you danced with Myshka, she'll have taken you there). The sword is visible in the water; retrieve it.
Return the sword to Radovan. You can choose to reveal Svatya's actions or simply focus on the sword's recovery. Once the sword is returned, the wedding ceremony commences. Complete any pre-wedding tasks, then congratulate the happy couple to progress the main quest.